steps to reproduce:

opendaylight-user@root>repo-add mvn:org.opendaylight.integration/features-integration-test/0.5.0-SNAPSHOT/xml/features
Adding feature url mvn:org.opendaylight.integration/features-integration-test/0.5.0-SNAPSHOT/xml/features
opendaylight-user@root>feature:install odl-integration-compatible-with-all
Refreshing bundles org.apache.sshd.core (30)
opendaylight-user@root>feature:install odl-restconf
opendaylight-user@root>feature:install odl-tsdr-cassandra
opendaylight-user@root>feature:install odl-tsdr-openflow-statistics-collector
java.lang.OutOfMemoryError: GC overhead limit exceeded
Dumping heap to java_pid30927.hprof ...
Heap dump file created [2872209701 bytes in 19.614 secs]

email discussion:

https://lists.opendaylight.org/pipermail/tsdr-dev/2016-August/000966.html