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https://issues.apache.org/jira/browse/CASSANDRA-6215?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13799228#comment-13799228
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Donald Smith commented on CASSANDRA-6215:
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Created https://datastax-oss.atlassian.net/browse/JAVA-201
> 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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