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From "Russ Hatch (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-6964) error in logs: ByteBuf.release() was not called before it's garbage-collected
Date Mon, 31 Mar 2014 23:49:17 GMT
Russ Hatch created CASSANDRA-6964:
-------------------------------------

             Summary: 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
         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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