rajeshkulkarni2000gmailcom Software, Support, and Training for Apache Cassandra en-US Thu, 23 May 2013 07:52:25 +0000 http://bbpress.org/?v=1.0.3 q http://www.datastax.com/support-forums/search.php http://www.datastax.com/support-forums/topic/problem-with-get#post-9000 Tue, 12 Feb 2013 04:16:41 +0000 rajesh.kulkarni2000@gmail.com 9000@http://www.datastax.com/support-forums/ <p>Thanks thobbs. It certainly helped to clarify my doubts about the process to be followed. I will ask more questions when needed.</p> <p>Regards,<br /> Rajesh Kulkarni </p> http://www.datastax.com/support-forums/topic/problem-with-get#post-8991 Mon, 11 Feb 2013 17:18:24 +0000 thobbs 8991@http://www.datastax.com/support-forums/ <blockquote><p>1)How to report a bug to cassandra community? I used this forum and it worked pretty well. Is this the right way Or should I raise a bug/defect in jira directly?</p></blockquote> <p>If you're sure the issue is a bug, you can certainly open a bug in JIRA directly. If you're not sure, feel free to ask a question about what behavior you're seeing here in the forums or on the Cassandra users' mailing list (you can find the info on it at the bottom of this page: <a href="http://cassandra.apache.org/)" rel="nofollow">http://cassandra.apache.org/)</a>.</p> <blockquote><p>2)Now that the reported defect is fix (thanks to Sylvain Lebresne), what is the next step? Who will commit the code? When will the committed code be available?</p></blockquote> <p>It will be committed by Sylvain or a reviewer of the ticket once it has been fully reviewed and tested. It will be committed to the cassandra-1.2 branch. The fix will be included in the 1.2.2 release, which will probably be released within the next few weeks. Bugfix releases happen about once a month.</p> <p>I hope that helps! Let me know if you have any other questions. </p> http://www.datastax.com/support-forums/topic/problem-with-get#post-8990 Mon, 11 Feb 2013 07:21:24 +0000 rajesh.kulkarni2000@gmail.com 8990@http://www.datastax.com/support-forums/ <p>Hi thobbs,<br /> "Sylvain Lebresne" has provided a fix. We integrated it at our end, built cassandra and it worked pretty well in our test environment. </p> <p>Since I am new to cassandra community, I wish to ask few more questions, especially relating to the process to be followed<br /> 1)How to report a bug to cassandra community? I used this forum and it worked pretty well. Is this the right way Or should I raise a bug/defect in jira directly?<br /> 2)Now that the reported defect is fix (thanks to Sylvain Lebresne), what is the next step? Who will commit the code? When will the committed code be available?</p> <p>I would appreciate if you could throw some light on this.</p> <p>Thanks,<br /> Rajesh Kulkarni </p> http://www.datastax.com/support-forums/topic/problem-with-get#post-8973 Thu, 07 Feb 2013 16:39:18 +0000 thobbs 8973@http://www.datastax.com/support-forums/ <p>Rajesh, you can "watch" JIRA tickets if you set up an account, which basically means you will get emailed if anything changes on the ticket. That's probably the easiest way for you to keep track of it. </p> http://www.datastax.com/support-forums/topic/problem-with-get#post-8965 Thu, 07 Feb 2013 03:48:40 +0000 rajesh.kulkarni2000@gmail.com 8965@http://www.datastax.com/support-forums/ <p>Thanks thobbs for the investigation! This is a critical feature for me as I have to get() random columns from the the row and hence I would request you to please keep me posted on this thread. </p> <p>Best Regards,<br /> Rajesh Kulkarni </p> http://www.datastax.com/support-forums/topic/problem-with-get#post-8951 Wed, 06 Feb 2013 19:21:21 +0000 thobbs 8951@http://www.datastax.com/support-forums/ <p>I've opened <a href="https://issues.apache.org/jira/browse/CASSANDRA-5225" rel="nofollow">https://issues.apache.org/jira/browse/CASSANDRA-5225</a> to address the bug. </p> http://www.datastax.com/support-forums/topic/problem-with-get#post-8949 Wed, 06 Feb 2013 18:24:28 +0000 thobbs 8949@http://www.datastax.com/support-forums/ <p>Rajesh,</p> <p>I can reproduce the issue now, thanks for the details. I'll look into the cause a bit more and keep you updated. </p> http://www.datastax.com/support-forums/topic/problem-with-get#post-8932 Wed, 06 Feb 2013 04:25:23 +0000 rajesh.kulkarni2000@gmail.com 8932@http://www.datastax.com/support-forums/ <p>Hi thobbs,<br /> Many thanks for your quick response</p> <p>I am using Cassandra version 1.2.1 (Downloaded apache-cassandra-1.2.1-bin.tar from <a href="http://cassandra.apache.org/download/)" rel="nofollow">http://cassandra.apache.org/download/)</a> </p> <p>And Yes, I am using exactly the same query/get request without other column names. Python code for the same looks like this</p> <p>print col_fam.get('IDTOEVENT',['12'])<br /> print col_fam.get('IDTOEVENT',['135']) --- Works<br /> print col_fam.get('IDTOEVENT',['1234'])</p> <p>This gives me the correct output but the get() with multiple column names does not give the result for column '135'<br /> print col_fam.get('IDTOEVENT',['12', '135', '1234'])-- Fails</p> <p>Any clue why?</p> <p>Thanks,<br /> Rajesh Kulkarni </p> http://www.datastax.com/support-forums/topic/problem-with-get#post-8928 Tue, 05 Feb 2013 23:23:37 +0000 thobbs 8928@http://www.datastax.com/support-forums/ <p>What version of Cassandra are you using? What query are you using to fetch '135' individually, just the same thing without the other two column names?</p> <p>It looks like you're doing everything correctly, so it's possible that there's a bug here. </p> http://www.datastax.com/support-forums/topic/problem-with-get#post-8921 Tue, 05 Feb 2013 13:33:40 +0000 rajesh.kulkarni2000@gmail.com 8921@http://www.datastax.com/support-forums/ <p>Hi,</p> <p>I have a ColumnFamily in cassandra with only 4 rows (keys). Each row has a lot of columns (and corresponding values). The 'column names' are numbers but stored as 'UTF-8' strings (for some reasons). There are literally millions of columns per row. I want to do a selective 'get' from each row to fetch values of very small number of columns...something like this (using pycassa python)</p> <p>from pycassa.pool import ConnectionPool<br /> from pycassa.columnfamily import ColumnFamily<br /> pool = ConnectionPool('BIGDATA_1', server_list=['127.0.0.1'])<br /> col_fam = ColumnFamily(pool, 'row1')<br /> print col_fam.get('IDTOEVENT',['12', '135', '1234'])</p> <p>The output I get is really strange:-<br /> OrderedDict([(u'12', 'Value of 12'), (u'1234', 'Value of 1234')])<br /> If you see value for column '135' is missing.<br /> If I do a get() on individual column names like '12', '135' and '1234' I see correct results.<br /> I feel, since column names are UTF-8 encoded, they are sorted alphabetically inside cassandra. Hence, while giving the output, Cassandra is throwing 12, followed by 1234 and then perhaps runs 'out of range' or 'out of buffer' limit. This missed 135 ..<br /> I am still new to Cassandra, so there is a high chance that I have missed something.<br /> Could someone please explain what is happening under the hood?</p> <p>Thanks,<br /> Rajesh Kulkarni </p>