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https://issues.apache.org/jira/browse/CASSANDRA-6964?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13956220#comment-13956220
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Sylvain Lebresne commented on CASSANDRA-6964:
---------------------------------------------
Hum, even if those are not a problem (haven't checked really, though I'm
slightly surprised that Netty would show such error message for no good
reason), they will show up for people and freak them out. So let's keep that
open as a reminder that this *needs* to be dealt with Cassandra side before the
final 2.1 release.
> error in logs: ByteBuf.release() was not called before it's garbage-collected
> -----------------------------------------------------------------------------
>
> Key: CASSANDRA-6964
> URL: https://issues.apache.org/jira/browse/CASSANDRA-6964
> Project: Cassandra
> Issue Type: Bug
> Reporter: Russ Hatch
> Fix For: 2.1 beta3
>
> Attachments: node1.log
>
>
> Running some of our paging tests against 2.1 several of these exceptions are
> triggered:
> {noformat}
> run_tests:
> [java] SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
> [java] SLF4J: Defaulting to no-operation (NOP) logger implementation
> [java] SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for
> further details.
> [java] test_zero_page_size_ignored (__main__.TestPagingSize) ... ERROR
> [java]
> [java]
> ======================================================================
> [java] ERROR: test_zero_page_size_ignored (__main__.TestPagingSize)
> [java]
> ----------------------------------------------------------------------
> [java] Traceback (most recent call last):
> [java] File
> "/home/rhatch/git/knifewine/cassandra-dtest-jython/base.py", line 152, in
> tearDown
> [java] raise AssertionError('Unexpected error in %s node log: %s' %
> (node.name, errors))
> [java] AssertionError: Unexpected error in node1 node log: ["ERROR
> [nioEventLoopGroup-3-2] 2014-03-31 17:16:44,337 Slf4JLogger.java:176 - LEAK:
> ByteBuf.release() was not called before it's garbage-collected. Enable
> advanced leak reporting to find out where the leak occurred. To enable
> advanced leak reporting, specify the JVM option
> '-Dio.netty.leakDetectionLevel=advanced' or call
> ResourceLeakDetector.setLevel()\n"]
> [java]
> [java]
> ----------------------------------------------------------------------
> [java] Ran 1 test in 37.876s
> [java]
> [java] FAILED (errors=1)
> {noformat}
> These tests are run through jython with the java driver, so there's a little
> bit of setup needed (if you have ccm and dtest you are most of the way there):
> 1. clone and set up https://github.com/riptano/cassandra-dtest-jython . You
> may need to install ivy and copy ivy.jar to ~/.ant/lib/ivy.jar
> 2. you should have ccm, and CASSANDRA_DIR should be set in your environment
> 3. from the root of cassandra-dtest-jython run the tests with 'ant
> run_tests'. The tests take about 10 minutes run completely.
> 4. if you don't want to wait for the entire test suite to run, change the
> bottom of paging_test.py to just run a single test like so:
> {noformat}
> if __name__ == '__main__':
> suite = unittest.TestSuite()
> suite.addTest(TestPagingSize("test_zero_page_size_ignored"))
>
> unittest.TextTestRunner(verbosity=2).run(suite)
>
> exit(0)
> {noformat}
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