Donald Smith created CASSANDRA-6215:
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Summary: 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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