[jira] [Resolved] (CASSANDRA-6215) Possible space leak in datastax.driver.core

["Brandon Williams (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-6215?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Brandon Williams resolved CASSANDRA-6215.
-----------------------------------------

    Resolution: Invalid

If you feel this is a driver problem, you should open a ticket at the driver's jira: https://datastax-oss.atlassian.net/browse/JAVA

> Possible space leak in datastax.driver.core
> -------------------------------------------
>
>                 Key: CASSANDRA-6215
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6215
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Drivers (now out of tree)
>         Environment: CentOS 6.4
>            Reporter: Donald Smith
>
> I wrote a java benchmark app that uses CQL cassandra-driver-core:1.0.3  and repeatedly saves to column families using code like:
> {noformat}
>    final Insert writeReportInfo = QueryBuilder.insertInto(KEYSPACE_NAME, REPORT_INFO_TABLE_NAME).value("type",report.type.toString()).value(...) ...
>     m_session.execute(writeReportInfo);
> {noformat}
> After running for about an hour, with -Xmx2000m, and writing about 20,000 reports (each with about 10000 rows), it got: java.lang.OutOfMemoryError: Java heap space.
> Using jmap and jhat I can see that the objects taking up space are 
> {noformat}
>  Instance Counts for All Classes (excluding platform)
> 1657280 instances of class com.datastax.driver.core.ColumnDefinitions$Definition
> 31628 instances of class com.datastax.driver.core.ColumnDefinitions
> 31628 instances of class [Lcom.datastax.driver.core.ColumnDefinitions$Definition;
> 31627 instances of class com.datastax.driver.core.PreparedStatement
> 31627 instances of class org.apache.cassandra.utils.MD5Digest 
> ...
> {noformat}



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