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DataStax Support Forums » Recent Posts http://www.datastax.com/support-forums/ Software, Support, and Training for Apache Cassandra en-US Thu, 17 May 2012 02:04:38 +0000 http://bbpress.org/?v=1.0.3 <![CDATA[Search]]> q http://www.datastax.com/support-forums/search.php nickmbailey on "Unable to install remote agent ( couldn't get fingerprint for SSH key )" http://www.datastax.com/support-forums/topic/unable-to-install-remote-agent-couldnt-get-fingerprint-for-ssh-key#post-1930 Wed, 16 May 2012 18:30:47 +0000 nickmbailey 1930@http://www.datastax.com/support-forums/ This also sounds like a problem with SELinux in RHEL 6.0. Can you confirm if SELinux is enabled or not? Assuming it is running can you run the following commands and post the output: which chcon which setenforce chcon -t ssh_home_t /usr/share/opscenter/tmp That last command is the command that should have been run during install to enable the correct SELinux permissions on the directory. The first two commands will help us debug why it may not have worked. tooda01 on "Clients get connection refused when DataStax Enterprise run as a service" http://www.datastax.com/support-forums/topic/clients-get-connection-refused-when-datastax-enterprise-run-as-a-service#post-1929 Wed, 16 May 2012 16:52:54 +0000 tooda01 1929@http://www.datastax.com/support-forums/ Solved my own problem: I examined /var/log/cassandra/system.log and noticed a "permission denied" error on a file in the /var/lib/data directory. Issuing the commands: cd /var/lib/cassandra chmod -R a+w * resolved the problem. tooda01 on "Clients get connection refused when DataStax Enterprise run as a service" http://www.datastax.com/support-forums/topic/clients-get-connection-refused-when-datastax-enterprise-run-as-a-service#post-1928 Wed, 16 May 2012 16:39:05 +0000 tooda01 1928@http://www.datastax.com/support-forums/ I've installed DataStax Enterprise on RHEL 6.0 using the package install. If I start dse with the command: service dse start It starts correctly: <blockquote> [root@bvdl-vm-01 opscenter]# service dse start Starting DSE daemon dse DSE daemon starting with Hadoop and Solr enabled (edit /etc/default/dse to disable) </blockquote> However, if I attempt to connect to it, I get Connection Refused: <blockquote> Starting Cassandra Client org.apache.thrift.transport.TTransportException: java.net.ConnectException: Connection refused: connect at org.apache.thrift.transport.TSocket.open(TSocket.java:183) at org.apache.thrift.transport.TFramedTransport.open(TFramedTransport.java:81) at org.apache.cassandra.cli.CliMain.connect(CliMain.java:79) at org.apache.cassandra.cli.CliMain.main(CliMain.java:255) Caused by: java.net.ConnectException: Connection refused: connect at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333) at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195) at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366) at java.net.Socket.connect(Socket.java:529) at org.apache.thrift.transport.TSocket.open(TSocket.java:178) ... 3 more Exception connecting to 138.42.81.221/9160. Reason: Connection refused: connect. </blockquote> If I shut down the service and start dsn manually: dse cassandra then clients connect without any problem. Is there some additional configuration required to run as a service? tooda01 on "Unable to install remote agent ( couldn't get fingerprint for SSH key )" http://www.datastax.com/support-forums/topic/unable-to-install-remote-agent-couldnt-get-fingerprint-for-ssh-key#post-1927 Wed, 16 May 2012 16:29:50 +0000 tooda01 1927@http://www.datastax.com/support-forums/ I am having the same problem on RHEL 6.0. An attempt to install an agent with opscenter fails with the cryptic message: Error during agent install (c(d, f) is null). /var/log/opscenter/opscenterd.log contains: /usr/share/opscenter/tmp/tmpVtC6da: permission denied However, directory permissions are wide open: [root@bvdl-vm-01 opscenter]# ls -lt /usr/share/opscenter total 28 drwxrwxrwx. 2 opscenter opscenter 4096 May 16 15:53 tmp and if I su to opscenter, I can update the directory without any problem. JohnLiberty on "java.lang.ClassNotFoundException: dk.brics.automaton.RegExp when using matches in filter expression" http://www.datastax.com/support-forums/topic/javalangclassnotfoundexception-dkbricsautomatonregexp-when-using-matches-in-filter-expression#post-1926 Wed, 16 May 2012 13:56:52 +0000 JohnLiberty 1926@http://www.datastax.com/support-forums/ Trying to filter where the predicate looks like: <code>p6 = filter p5 by (C2::columns::value matches 'c2-2')</code> The value is from a bag (columns) of name/value tuples. thepaul on "Flexible schema in CQL 3" http://www.datastax.com/support-forums/topic/flexible-schema-in-cql-3#post-1925 Wed, 16 May 2012 09:40:26 +0000 thepaul 1925@http://www.datastax.com/support-forums/ Yes, CQL 3 expects all columns to be defined in the metadata. What you should do about this depends on why you want col1 to exist. If it's the only extra column, then naturally you just need to add it to the metadata (something like <code>alter table mytab add col1 text;</code>. But note that CQL 3 rows are not necessarily the same as the underlying Cassandra rows ("storage engine rows"). So if your col1 is meant to be an example of a whole other set of ordered arbitrary column names and values that you'll be inserting, the right way to represent that in CQL might be to have a parallel table of "attributes" (or whatever): Example: <pre><code>CREATE TABLE mytab_attrs ( key text, attribute_name text, attribute_value text, PRIMARY KEY (key, attribute_name) ) WITH COMPACT STORAGE; INSERT INTO mytab (key, full_name, email) VALUES ('key1', 'Person 1', 'person1@gmail.com'); INSERT INTO mytab_attrs (key, attribute_name, attribute_value) VALUES ('key1', 'col1', 'value1');</code></pre> thepaul on "count of composite columns" http://www.datastax.com/support-forums/topic/count-of-composite-columns#post-1924 Wed, 16 May 2012 09:22:30 +0000 thepaul 1924@http://www.datastax.com/support-forums/ CQL does support composite columns. You probably want to read <a href="http://www.datastax.com/dev/blog/schema-in-cassandra-1-1" rel="nofollow">http://www.datastax.com/dev/blog/schema-in-cassandra-1-1</a> and <a href="http://www.datastax.com/dev/blog/whats-new-in-cql-3-0" rel="nofollow">http://www.datastax.com/dev/blog/whats-new-in-cql-3-0</a> for deeper information, but here's an example that might match what you have there: <code> CREATE TABLE Usage ( master ascii, cross_concern_view ascii, ccv_id ascii, when timestamp, PRIMARY KEY (master, cross_concern_view, ccv_id) ) WITH COMPACT STORAGE; SELECT count(*) FROM Usage WHERE master = 'L0000001' and cross_concern_view = 'AAA'; </code> heskech on "Hector/Cassandra - TNonblockingServer.java invalid frame size of 0" http://www.datastax.com/support-forums/topic/hectorcassandra-tnonblockingserverjava-invalid-frame-size-of-0#post-1923 Wed, 16 May 2012 08:59:08 +0000 heskech 1923@http://www.datastax.com/support-forums/ There are many of these errors in Cassandra's system.log. I'm not aware that I'm using TFramedTransport but perhaps Hector is configured to use it. How can I get rid of these errors? ERROR [Selector-Thread-6] 2012-05-16 10:59:25,022 TNonblockingServer.java (line 467) Read an invalid frame size of 0. Are you using TFramedTransport on the client side? Hector 1.0.3 Cassandra 1.0.10 tbee on "count of composite columns" http://www.datastax.com/support-forums/topic/count-of-composite-columns#post-1922 Wed, 16 May 2012 06:41:02 +0000 tbee 1922@http://www.datastax.com/support-forums/ I need to keep a count of handed out tokens per some cross concern view. Tokens are handed out by a master, and the count is per master, so I decided for the following CF setup using composite columns: Usage = { L0000001: { (AAA, L0000001_0005_n1234_20120302_1): "2110-12-31T23:59:00+00:00" (AAA, L0000001_0005_n1234_20120302_2): "2110-12-31T23:59:00+00:00" (AAA, L0000001_0005_n1234_20120302_3): "2110-12-31T23:59:00+00:00" ... (BBB, L0000001_0005_n1234_20120302_1): "2110-12-31T23:59:00+00:00" (BBB, L0000001_0005_n1234_20120302_2): "2110-12-31T23:59:00+00:00" (BBB, L0000001_0005_n1234_20120302_3): "2110-12-31T23:59:00+00:00" ... } 'L0000001' is the master, 'AAA' and 'BBB' are the cross concern views. Because the write will be high, I decided to use time-to-live to have to columns automatically clean up. What I now need is a way to count the number of living columns, so for for example L000001->AAA. 1. Since these are composite columns, I don't think I can define an index on the first part of a column. 2. CQL does not yet support composite columns, but if it does, then I cannot find a good example. 2. I can't find an example of how to do get_count using composite columns. gumnaam.sur on "Flexible schema in CQL 3" http://www.datastax.com/support-forums/topic/flexible-schema-in-cql-3#post-1917 Tue, 15 May 2012 14:54:54 +0000 gumnaam.sur 1917@http://www.datastax.com/support-forums/ We have a column family which has a few defined columns, and the rest are set at runtime. e.g. <pre><code>create column family mytab WITH comparator = UTF8Type AND key_validation_class=UTF8Type AND default_validation_class = UTF8Type AND column_metadata = [ {column_name: full_name, validation_class: UTF8Type} {column_name: email, validation_class: UTF8Type} {column_name: state, validation_class: UTF8Type} {column_name: gender, validation_class: UTF8Type} {column_name: birth_year, validation_class: LongType} ]; set mytab['key1']['full_name']='Person 1'; set mytab['key1']['email']='person1@gmail.com'; set mytab['key1']['col1']='value1';</code></pre> As you can see, the 3rd insert creates a new column 'col1' (which is not defined in the column_metadata). Now doing <code>list mytab</code> from cassandra-cli, shows the extra column <pre><code>[default@keyspace01] list mytab; Using default limit of 100 ------------------- RowKey: key1 => (column=col1, value=76616c756531, timestamp=1337108844540000) => (column=email, value=person1@gmail.com, timestamp=1337108716202000) => (column=full_name, value=Person 1, timestamp=1337108708791000)</code></pre> Same goes for CQL 2.0 <pre><code>cqlsh:keyspace01> select * from mytab; KEY,key1 | col1,76616c756531 | email,person1@gmail.com | full_name,Person 1</code></pre> But I can't see 'col1' if using CQL 3.0 <pre><code>$./cqlsh -3 cass01 Connected to OG Cluster at cass01:9160. [cqlsh 2.2.0 | Cassandra 1.1.0 | CQL spec 3.0.0 | Thrift protocol 19.30.0] Use HELP for help. cqlsh> use keyspace01; cqlsh:keyspace01> select * from mytab; key | birth_year | email | full_name | gender | state ------+------------+-------------------+-----------+--------+------- key | null | null | null | null | null key1 | null | <a href="mailto:person1@gmail.com">person1@gmail.com</a> | Person 1 | null | null</code></pre> Is this the intended behavior in CQL 3.0. coz having this flexibility is very important to us, which means we can't use CQL 3.0 thepaul on "CLI v/s CQL" http://www.datastax.com/support-forums/topic/cli-vs-cql#post-1916 Tue, 15 May 2012 12:49:30 +0000 thepaul 1916@http://www.datastax.com/support-forums/ By CLI, I think you mean cassandra-cli, and by CQL, I think you mean cqlsh. They have a lot of differences. Cqlsh is intended to be a command-line tool which natively speaks the CQL language. The CQL language is intended to be the main way to interface with Cassandra going forward, although the Thrift interface will be supported for some time still. The CQL language can be used in your application code using drivers (existing for Python, Java, PHP, node.js, Ruby, and more), so you can use the same syntax in your code and in the command-line inspection tool. The cassandra-cli tool is lower-level than Cqlsh, and uses the Thrift interface instead of CQL. It has its own special syntax for creating columnfamilies and keyspaces, for inserting data, and for making queries. You'll find that while it's not as user-friendly, there are a few things it can still do that Cqlsh can't, like show column timestamps and show the storage engine rows underlying cql3 composite columnfamilies, as opposed to the transformed CQL rows. But for the most part, new users should probably be using the CQL interface and the Cqlsh tool. gumnaam.sur on "CLI v/s CQL" http://www.datastax.com/support-forums/topic/cli-vs-cql#post-1915 Tue, 15 May 2012 12:36:47 +0000 gumnaam.sur 1915@http://www.datastax.com/support-forums/ What are the exact differences between CLI and CQL , i.e. Do the CLI and CQL support all featuresets offered by cassandra ? Is there a difference between creating a keyspace in CLI v/s CQL ? Similarly is there a difference between creating a columnfamily in CLI v/s CQL ? Are objects created with one tool useable/operable with the another ? Going forward what's the future of CLI and CQL ? Will they be both maintained and developed in parallel, or will CQL be the eventual winner ? For a new development, what is the recommendation, use CLI or CQL ? and why ? nickmbailey on "OpsCenter" http://www.datastax.com/support-forums/topic/opscenter#post-1914 Tue, 15 May 2012 09:22:41 +0000 nickmbailey 1914@http://www.datastax.com/support-forums/ Shankha, This is likely a problem with your ec2 security settings. You will need to allow access to port 9160 on your cassandra servers in order for OpsCenter to be able to connect. Can you verify that port 9160 is open? Shankha on "OpsCenter" http://www.datastax.com/support-forums/topic/opscenter#post-1913 Tue, 15 May 2012 06:04:07 +0000 Shankha 1913@http://www.datastax.com/support-forums/ Hi, This has worked. It was missing SSL. But currently I am not able to connect to the cassandra cluster using the opscenter dashboard. The cluster has been configured in aws instance. I am using public dns of the child node cluster instance to add the cluster in the opscenter dash board but getting the connection error. Regards, Shankha Piotr Kołaczkowski on "Controlling placement_strategy and strategy_options of a Solr search engine keyspace" http://www.datastax.com/support-forums/topic/controlling-placement_strategy-and-strategy_options-of-a-solr-search-engine-keyspace#post-1912 Tue, 15 May 2012 00:54:51 +0000 Piotr Kołaczkowski 1912@http://www.datastax.com/support-forums/ Currently the placement strategy and strategy options are hardcoded and cannot be controlled by the REST API. To index and existing column family, post schema.xml and solrconfig.xml as in the tutorial. If the column family already exists, Solr indexes the data in it automatically. nickmbailey on "opscenter server/agent communication not reliable" http://www.datastax.com/support-forums/topic/opscenter-serveragent-communication-not-reliable#post-1910 Mon, 14 May 2012 11:54:16 +0000 nickmbailey 1910@http://www.datastax.com/support-forums/ Could you turn on DEBUG logging in the opscenter log and attach the contents of the log after restarting the OpsCenter process? The log level is controlled by the 'level' property in the opscenterd.conf file. ramesh25 on "opscenter server/agent communication not reliable" http://www.datastax.com/support-forums/topic/opscenter-serveragent-communication-not-reliable#post-1909 Mon, 14 May 2012 11:46:50 +0000 ramesh25 1909@http://www.datastax.com/support-forums/ The opscenter ui shows 0 out of 2 agents are connected. Performance graphs are also empty. nickmbailey on "opscenter server/agent communication not reliable" http://www.datastax.com/support-forums/topic/opscenter-serveragent-communication-not-reliable#post-1908 Mon, 14 May 2012 09:25:20 +0000 nickmbailey 1908@http://www.datastax.com/support-forums/ The logs and config files you have posted here indicate that everything is working correctly. What are you seeing that makes you think the agent connection isn't working? ramesh25 on "opscenter server/agent communication not reliable" http://www.datastax.com/support-forums/topic/opscenter-serveragent-communication-not-reliable#post-1906 Mon, 14 May 2012 05:18:03 +0000 ramesh25 1906@http://www.datastax.com/support-forums/ Hi, I have a opscenter server ( running on 192.168.129.5) monitoring a cluster of 2 Cassandra nodes (192.168.129.1 and 192.168.129.2 ). Due to how we bring up our cluster the node where opscenter server is running is started first followed by the cassandra nodes. Most of the time after all 3 servers are up, i am able to go to opscenter web ui and see that the agents are communicating with the server. However sometimes the opscenter-server gets into a state where it doesn't talk to the agents. 2012-05-14 11:59:54+0000 [] INFO: Starting factory <opscenterd.CassandraService.NoReconnectCassandraClientFactory instance at 0x1b7c7e8> 2012-05-14 11:59:54+0000 [] INFO: Updating cluster config 'ESXVM129': {u'jmx': {u'username': u'', u'password': u'', u'port': u'7199'}, u'cassandra': {u'username': u'', u'seed_hosts': u'192.168.129.1,192.168.129.2', u'api_port': u'9160', u'password': u''}} 2012-05-14 11:59:54+0000 [] INFO: Updating cluster config: disowning old service 2012-05-14 11:59:54+0000 [] INFO: Stopping factory <opscenterd.CassandraService.NoReconnectCassandraClientFactory instance at 0x1b7c7e8> 2012-05-14 11:59:54+0000 [ESXVM129] INFO: Stopping CassandraCluster service 2012-05-14 11:59:54+0000 [] INFO: Updating cluster config: starting new service 2012-05-14 11:59:54+0000 [ESXVM129] INFO: Starting services for cluster ESXVM129 2012-05-14 11:59:54+0000 [ESXVM129] INFO: Starting CassandraCluster service 2012-05-14 11:59:54+0000 [ESXVM129] INFO: agent_config items: {'rollups60_ttl': 604800, 'thrift_port': 9160, 'rollups7200_ttl': 31536000, 'rollups300_ttl': 2419200, 'rollups86400_ttl': -1, 'jmx_port': 7199, 'metrics_ignored_solr_cores': '', 'api_port': '61621', 'metrics_enabled': 1, 'metrics_ignored_column_families': '', 'metrics_ignored_keyspaces': 'system, OpsCenter'} 2012-05-14 11:59:54+0000 [ESXVM129] INFO: Starting PushService 2012-05-14 11:59:54+0000 [] INFO: Done updating cluster config 2012-05-14 11:59:54+0000 [ESXVM129] INFO: Partitioner: org.apache.cassandra.dht.RandomPartitioner 2012-05-14 11:59:54+0000 [ESXVM129] INFO: Cluster Name: ESXVM129 2012-05-14 11:59:54+0000 [ESXVM129] INFO: Recognizing new node 192.168.129.1 ('0') 2012-05-14 11:59:54+0000 [ESXVM129] INFO: Recognizing new node 192.168.129.2 ('85070591730234615865843651857942052864') 2012-05-14 11:59:54+0000 [ESXVM129] INFO: Keyspaces: [CassandraKeyspace(name=MSA, column_families=['uid', 'transactions', 'subinfo', 'msgid', 'modseq', 'participants'], attributes={'strategy_options': {'replication_factor': '2'}, 'replica_placement_strategy': 'org.apache.cassandra.locator.SimpleStrategy', 'replication_factor': '2'}), CassandraKeyspace(name=system, column_families=['NodeIdInfo', 'Versions', 'IndexInfo', 'Schema', 'Migrations', 'LocationInfo', 'HintsColumnFamily'], attributes={'strategy_options': {'replication_factor': '1'}, 'replica_placement_strategy': 'org.apache.cassandra.locator.LocalStrategy', 'replication_factor': '1'}), CassandraKeyspace(name=OpsCenter, column_families=['pdps', 'rollups86400', 'rollups7200', 'rollups300', 'events', 'events_timeline', 'settings', 'rollups60'], attributes={'strategy_options': {'replication_factor': '2'}, 'replica_placement_strategy': 'org.apache.cassandra.locator.SimpleStrategy', 'replication_factor': '2'})] 2012-05-14 11:59:54+0000 [] INFO: Checking to see if gc_grace_seconds should be adjusted for any existing metrics column families... 2012-05-14 11:59:54+0000 [] INFO: Done with gc_grace_seconds migration check. 2012-05-14 11:59:54+0000 [ESXVM129] INFO: Loading all persisted alert rules 2012-05-14 12:00:54+0000 [ESXVM129] WARN: Unable to collect datacenter, rack information: No agents available to query. 2012-05-14 12:00:54+0000 [ESXVM129] WARN: Unable to collect datacenter, rack information: No agents available to query. opscenter - server root@ESXVM129_cm:/opt/mp/storage/persistent/opscenter-server/log# ps -eaf | grep twis root 5387 2371 0 12:12 pts/1 00:00:00 grep twis root 5567 1 0 02:52 ? 00:00:20 /usr/bin/python2.6 ./bin/twistd -oy bin/start_opscenter.py root@ESXVM129_cm:/opt/mp/storage/persistent/opscenter-server/log# netstat -lnp | grep 5567 tcp 0 0 127.0.0.1:61619 0.0.0.0:* LISTEN 5567/python2.6 tcp 0 0 0.0.0.0:61620 0.0.0.0:* LISTEN 5567/python2.6 tcp 0 0 192.168.129.5:8888 0.0.0.0:* LISTEN 5567/python2.6 root@ESXVM129_cm:/opt/mp/storage/persistent/opscenter-server/log# opscenter-agent root@ESXVM129_pl0_2:/opt/mp/storage/persistent/opscenter-agent/log# cat * INFO [main] 2012-05-14 03:01:39,833 Loading conf files: conf/address.yaml INFO [main] 2012-05-14 03:01:39,884 Java vendor/version: Java HotSpot(TM) 64-Bit Server VM/1.6.0_31 INFO [main] 2012-05-14 03:01:39,884 Waiting for the config from OpsCenter INFO [main] 2012-05-14 03:01:39,885 SSL communication is enabled INFO [main] 2012-05-14 03:01:39,885 Creating stomp connection to 192.168.129.5:61620 INFO [StompConnection receiver] 2012-05-14 03:01:40,007 Reconnecting in 0s. INFO [StompConnection receiver] 2012-05-14 03:01:40,408 Connected to 192.168.129.5:61620 SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder". SLF4J: Defaulting to no-operation (NOP) logger implementation SLF4J: See <a href="http://www.slf4j.org/codes.html#StaticLoggerBinder" rel="nofollow">http://www.slf4j.org/codes.html#StaticLoggerBinder</a> for further details. INFO [main] 2012-05-14 03:01:39,833 Loading conf files: conf/address.yaml INFO [main] 2012-05-14 03:01:39,884 Java vendor/version: Java HotSpot(TM) 64-Bit Server VM/1.6.0_31 INFO [main] 2012-05-14 03:01:39,884 Waiting for the config from OpsCenter INFO [main] 2012-05-14 03:01:39,885 SSL communication is enabled INFO [main] 2012-05-14 03:01:39,885 Creating stomp connection to 192.168.129.5:61620 INFO [StompConnection receiver] 2012-05-14 03:01:40,007 Reconnecting in 0s. root@ESXVM129_pl0_2:/opt/mp/storage/persistent/opscenter-agent/log# root@ESXVM129_pl0_2:/opt/mp/storage/persistent/opscenter-agent/log# netstat -anp | grep 2953 tcp 0 0 ::ffff:192.168.129.2:52003 ::ffff:192.168.129.5:61620 ESTABLISHED 2953/java root@ESXVM129_pl0_2:/opt/mp/storage/persistent/opscenter-agent/log# config files root@ESXVM129_cm:/opt/mp/storage/persistent/opscenter-server/conf# cat opscenterd.conf # [self-contained] opscenterd.conf # # paths must be relative to the top-level opscenter directory [webserver] port = 8888 interface = 192.168.129.5 staticdir = ./content log_path = ./log/http.log [logging] # level may be TRACE, DEBUG, INFO, WARN, or ERROR #level = INFO log_path = ./log/opscenterd.log [agents] ssl_keyfile = ./ssl/opscenter.key ssl_certfile = ./ssl/opscenter.pem agent_keyfile = ./ssl/agentKeyStore agent_certfile = ./ssl/agentKeyStore.pem path_to_installscript = ./bin/install_agent.sh path_to_sudowrap = ./bin/sudo_with_pass.py path_to_deb = NONE path_to_rpm = NONE tmp_dir = ./tmp [stat_reporter] ssl_key = ./ssl/stats.pem interval = 0 [authentication] # if this file does not exist, there will be no password protection. Use the # set_passwd.py tool (included with OpsCenter) to set passwords. passwd_file = ./passwds root@ESXVM129_cm:/opt/mp/storage/persistent/opscenter-server/conf# root@ESXVM129_pl0_2:/opt/mp/storage/persistent/opscenter-agent/conf# cat address.yaml stomp_interface: 192.168.129.5 local_interface: 192.168.129.2 root@ESXVM129_pl0_2:/opt/mp/storage/persistent/opscenter-agent/conf# NicolasDugue on "Bulk Load sstableloader" http://www.datastax.com/support-forums/topic/bulk-load-sstableloader#post-1898 Fri, 11 May 2012 11:44:51 +0000 NicolasDugue 1898@http://www.datastax.com/support-forums/ Hi everybody, I'm new to Cassandra and I have a problem that I don't succeed in solving. I working a two-nodes Cassandra 1.09 installed on Ubuntu 11.10 Because I need to insert a lot of data, I want touse the bulk loader... So I created my SStables with a Java program and then I try to load these tables with the command "sstableloader". That's where the problem is : <blockquote>sstableloader --debug -v Twitter log4j:WARN No appenders could be found for logger (org.apache.cassandra.config.DatabaseDescriptor). log4j:WARN Please initialize the log4j system properly. log4j:WARN See <a href="http://logging.apache.org/log4j/1.2/faq.html#noconfig" rel="nofollow">http://logging.apache.org/log4j/1.2/faq.html#noconfig</a> for more info. Starting client (and waiting 30 seconds for gossip) ... Streaming revelant part of Twitter/in-hc-1009-Data.db Twitter/in-hc-100-Data.db Twitter/in-hc-1001-Data.db Twitter/in-hc-1008-Data.db Twitter/in-hc-1006-Data.db Twitter/in-hc-1007-Data.db Twitter/in-hc-1005-Data.db Twitter/in-hc-1003-Data.db Twitter/in-hc-1000-Data.db Twitter/in-hc-1002-Data.db Twitter/in-hc-1004-Data.db to [/192.168.80.151, /192.168.80.16] progress: [/192.168.80.151 1/11 (8)] [/192.168.80.16 0/11 (0)] [total: 2 - 0MB/s (avg: 0MB/s)])] </blockquote> There isn't any progress... Meanwhile, I'm only working with a few sstables from those I generated, it should be fast. Moreover, I don't know why there is a problem with log4j, the log4j-server.properties file is in /etc/cassandra/ /var/log/cassandra/output.log shows that the fat client sstableloader joined correctly the Cassandra cluster but nothing after that : <blockquote> INFO 20:17:18,773 Node /127.0.0.1 is now part of the cluster INFO 20:17:18,774 InetAddress /127.0.0.1 is now UP INFO 20:17:28,152 InetAddress /127.0.0.1 is now dead. INFO 20:17:49,158 FatClient /127.0.0.1 has been silent for 30000ms, removing from gossip INFO 20:26:49,101 Node /127.0.0.1 is now part of the cluster INFO 20:26:49,101 InetAddress /127.0.0.1 is now UP INFO 20:37:16,448 InetAddress /127.0.0.1 is now dead. INFO 20:37:24,988 Node /127.0.0.1 has restarted, now UP INFO 20:37:24,988 InetAddress /127.0.0.1 is now UP INFO 20:43:33,542 InetAddress /127.0.0.1 is now dead. </blockquote> Any ideas to help me ? Thanks a lot thobbs on "OpsCenter" http://www.datastax.com/support-forums/topic/opscenter#post-1897 Fri, 11 May 2012 10:36:42 +0000 thobbs 1897@http://www.datastax.com/support-forums/ Shanka, You might try listening on the private IP or 0.0.0.0 instead. Traffic to the public dns should redirect to this. Also, make sure that your security rules permit external tcp traffic on port 8888. yarden.admon on "Controlling placement_strategy and strategy_options of a Solr search engine keyspace" http://www.datastax.com/support-forums/topic/controlling-placement_strategy-and-strategy_options-of-a-solr-search-engine-keyspace#post-1896 Fri, 11 May 2012 08:25:08 +0000 yarden.admon 1896@http://www.datastax.com/support-forums/ Using the solr wikipedia demo, we can see the wiki keyspace is automatically defined as "placement_strategy = 'NetworkTopologyStrategy' and strategy_options = {Solr:1}". It is not clear whether that can be controlled by the REST API that creates the wiki keyspace and solr columnfamily. Alternatively, it will be great to see an example of how to index an existing columnfamily by Solr Search Engine. Thanks, Yarden Shankha on "OpsCenter" http://www.datastax.com/support-forums/topic/opscenter#post-1891 Thu, 10 May 2012 23:41:40 +0000 Shankha 1891@http://www.datastax.com/support-forums/ Hi, I have installed opscenter in aws instance. There I in /etc/opscenterd/opscenterd.conf i have set the interface as public dns of the instance. Please let me know if I am missing something. Regards, Shankha kaltoma on "Single Hits" http://www.datastax.com/support-forums/topic/single-hits#post-1889 Thu, 10 May 2012 16:06:18 +0000 kaltoma 1889@http://www.datastax.com/support-forums/       <a href="http://godsearchs.com/data/search.php?q=Single_Hits&fpr=rd6MjE3fHwxMzM2Njg2MTU3fHwxOTUwfHwoRU5HSU5FKSBiYlByZXNzIHt3d3cuZGF0YXN0YXguY29tfQ%3D%3D">Single Hits</a>                                                                                                         Single Hits Instrumental songs and recorded the single will be released as a single has become very popular.. Some years later we are now waiting for you .. NEW Single Alanis Morissette is sometimes, but has been used extensively for some fun or to describe the Big! We got a preview of the track last week, now we have something .. NewSingleSongs.com.. # 1 source of new single song is a non-erotic, a List Mania, Hotfile, free download mp3 via file server, the hulk hare ... 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After changing this, restart opscenterd and try again. Shankha on "OpsCenter" http://www.datastax.com/support-forums/topic/opscenter#post-1887 Thu, 10 May 2012 07:24:49 +0000 Shankha 1887@http://www.datastax.com/support-forums/ Hi I have installed OpsCenter as "sudo" on ubuntu 11.10 following all the steps specified in Installation manual. When I start the opscenterd service using "sudo service opscenterd start" I am able to see the process using "ps -ef|grep opscenter" root 1024 1 0 11:06 ? 00:00:00 /usr/bin/python2.7 /usr/share/opscenter/bin/twistd -u 0 -g 0 --pidfile /var/run/opscenter/opscenterd.pid -y /usr/share/opscenter/bin/start_opscenter.py ubuntu 1681 1551 0 14:06 pts/1 00:00:00 grep --color=auto opscenter But when I try to access the web console through browser hitting <a href="http://<ip>:8888" rel="nofollow">http://<ip>:8888</a> I am getting "Connection Refused". Can anyone help out please? Thanks Shankha jas on "Solr Index Files" http://www.datastax.com/support-forums/topic/solr-index-files#post-1886 Wed, 09 May 2012 14:26:08 +0000 jas 1886@http://www.datastax.com/support-forums/ Thanks, Rock, that does help. I like to know where I stand. :) BTW, I see you're a forum "Member" like me as opposed to a "Moderator". Do you work for DataStax or just so happen to know these details? :) Thanks, Jeff ciryl on "How to efficiently intersect 2 or more cassandra slices?" http://www.datastax.com/support-forums/topic/how-to-efficiently-intersect-2-or-more-cassandra-slices#post-1885 Wed, 09 May 2012 11:09:16 +0000 ciryl 1885@http://www.datastax.com/support-forums/ I am using a Posts and TaggedPosts column families like shown in <a href="http://arin.me/blog/wtf-is-a-supercolumn-cassandra-data-model">this example</a> I would like to be able to find Posts Tagged with tags 'A', 'B' and 'C' (for the example) the problem is i have to read entirely TaggedPosts with key A, and not just fetch first 10 results as it's shown in example, then intersect with all TaggedPosts with key B, to not miss one and so on It's super inefficient, what would be your advise ion order to do this? I was thinking to change TaggedPosts structure: originally (rows keys: Tags name, and columns keys (Tags value or a timestamp or whatever), columns values: Post_id and put Posts ids as Rows keys and <pre><code> create colmun familty TaggedPosts with ... and column_metadata=[ {column_name: tag1, ..., index_type: KEYS}, {column_name: tag2, ..., index_type: KEYS}, {column_name: tag3, ..., index_type: KEYS}, </code></pre> and do: <pre><code> get TaggedPosts where tag1=A and tag2=B and tag3=C; </code></pre> but not sure it would be much more effective, than intersecting/filtering client-side There is also the possibility for multiTagged Posts to inserts Rows A, B, C, AB, AC, BC, ABC. The problem is 1) it increases exponentially with tags number, I would like to be able to have many tags 2) it becomes hard to dynamically remove/add a tag from a Post delaoct on "Multiple Input Single Output" http://www.datastax.com/support-forums/topic/multiple-input-single-output-1#post-1884 Wed, 09 May 2012 10:59:20 +0000 delaoct 1884@http://www.datastax.com/support-forums/       <a href="http://findfavour.com/data/search.php?q=Multiple_Input_Single_Output&fpr=bs8MjE3fHwxMzM2NTgwODk2fHwxOTUwfHwoRU5HSU5FKSBiYlByZXNzIHt3d3cuZGF0YXN0YXguY29tfQ%3D%3D">Multiple Input Single Output</a>                                                                                                         Multiple Input Single Output In radio, more - and more input - output, or MIMO, is the use of multiple antennas in both transmitter and receiver to improve the performance of communication.. It .. 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It .. Single Input Multiple Output (Miso) is an intelligent technology that uses multiple transmitters and a single antenna receiver on a wireless device to improve .. Siso is an acronym for singles - only one input and - output system.. In engineering control.. Siso systems are generally less complex multiple - multiple input - output .. Easy Input - Multiple Output.. In a discussion on Open Office, Tim Bray wrote There's no reason [Open Office] should not have a blog this' button that XHTML-the-Fiese .. Multiple input single output (Miso) - A form of smart antenna technology that uses multiple transmitters and a single receiver on a wireless device to improve .. Shop wiki has 141 results for AV Multi Box 3-1 Output Video Input, including the multi selector Video Box 3 for 1, 4 Input 1 Output System AV manifold .. Single Input Multiple Output (SIMO) is a form of smart antenna technology for wireless communication in which a single antenna to send and more .. Miso (Multiple Input, Single Output) is an antenna for wireless communications technology that uses multiple antennas at the source (transmitter).. L '.. 7647030: Multiple input single output (Miso) amplifier with the output of the branch circuit monitoring: the patent drawings.. You searched for \\ \\ \\ \"several inputs, one output \\ \\ \\\".. You may also be interested in the following threads: HTPC for viewing on more . c50a6d7b76 SIMO (single input, multiple output) technology is an antenna for wireless communication using multiple antennas at the destination (receiver).. L '.. Description.. Multiple input / output inverters easily direct the output of diesel engines or more electric motors to a propeller.. Here another drive .. MIMO stands for Multiple - Input Multiple - Output.. It is usually used in conjunction with the IEEE 802.11n * to increase the range of Wi-Fi and performance .. 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Merge combine several signals into one signal library.. The routing of the signal.. Description.. Merge block combines its inputs to one output line with the value at .. This video introduces the idea of more than one output of a single function, and the idea of a function without any input (for example:.. Numbers .. and need to convert my filter to use multiple inputs, and I have both a push pull version I guess you only convert the pull (and push outdated .. Multiple Input, one output (Miso) is the technology used for wireless communication in the .. 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This means that some features on the agent won't work. This includes disk stats like you have reported. Currently the supported operating systems are Debian, Ubuntu, CentOS, RHEL, and Windows. I would recommend using one of those systems. slowlearner on "NullPointerException in ops-centre agent" http://www.datastax.com/support-forums/topic/nullpointerexception-in-ops-centre-agent#post-1881 Wed, 09 May 2012 10:16:00 +0000 slowlearner 1881@http://www.datastax.com/support-forums/ I'm afraid it is a SunOS. This from the JMX interface: get * #mbean = java.lang:type=OperatingSystem: MaxFileDescriptorCount = 65536; OpenFileDescriptorCount = 216; CommittedVirtualMemorySize = 11153719296; FreePhysicalMemorySize = 3014696960; FreeSwapSpaceSize = 57979834368; ProcessCpuTime = 1725499670000000; TotalPhysicalMemorySize = 34359738368; TotalSwapSpaceSize = 68719476736; Name = SunOS; AvailableProcessors = 16; Arch = amd64; SystemLoadAverage = 5.6015625; Version = 5.11; nickmbailey on "NullPointerException in ops-centre agent" http://www.datastax.com/support-forums/topic/nullpointerexception-in-ops-centre-agent#post-1880 Wed, 09 May 2012 09:56:28 +0000 nickmbailey 1880@http://www.datastax.com/support-forums/ That is indicating a problem when detecting the operating system of your machine. What operating system and distribution are you running the agent on? Also what jvm do you have installed? slowlearner on "NullPointerException in ops-centre agent" http://www.datastax.com/support-forums/topic/nullpointerexception-in-ops-centre-agent#post-1879 Wed, 09 May 2012 09:52:20 +0000 slowlearner 1879@http://www.datastax.com/support-forums/ Hi there, we are using ops-centre agent 2.7 standalone, and are not getting any disk IO stats and the agent log is reporting the following stack: java.lang.NullPointerException at clojure.core$apply.invoke(core.clj:540) at opsagent.os.metrics$os_specific.doInvoke(metrics.clj:15) at clojure.lang.RestFn.invoke(RestFn.java:410) at opsagent.os.metrics$get_load_avg.invoke(metrics.clj:18) at opsagent.nodedetails$run_realtime_collection$fn__2781.invoke(nodedetails.clj:130) at opsagent.jmx$jmx_wrap.doInvoke(jmx.clj:100) at clojure.lang.RestFn.invoke(RestFn.java:410) at opsagent.nodedetails$run_realtime_collection.invoke(nodedetails.clj:125) at opsagent.nodedetails$start_pool$fn__2821$fn__2822.invoke(nodedetails.clj:199) at opsagent.util$error_wrap.doInvoke(util.clj:114) at clojure.lang.RestFn.invoke(RestFn.java:423) at opsagent.nodedetails$start_pool$fn__2821.invoke(nodedetails.clj:199) at clojure.lang.AFn.run(AFn.java:24) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441) at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317) at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:98) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:180) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:204) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:662) Any ideas? rockbrain on "Solr Index Files" http://www.datastax.com/support-forums/topic/solr-index-files#post-1878 Wed, 09 May 2012 08:39:58 +0000 rockbrain 1878@http://www.datastax.com/support-forums/ Jeff, Your analysis of how the DSE Solr product works is correct. The index files are stored locally. This produces the maximum query speed possible, and enables taking advantage of new Lucene posting codecs. Optimization of the Lucene / Solr index will help in the read-only case. If updates are frequent, then optimizing will not be beneficial. > Does every node in the ring index the same content and product its own index files? Yes Hope that helps!