[jira] [Created] (CASSANDRA-15170) Reduce the time needed to release in-JVM dtest cluster resources after close

["Jon Meredith (JIRA)" <ji...@apache.org>]

Jon Meredith created CASSANDRA-15170:
----------------------------------------

             Summary: Reduce the time needed to release in-JVM dtest cluster resources after close
                 Key: CASSANDRA-15170
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-15170
             Project: Cassandra
          Issue Type: Improvement
          Components: Test/dtest
            Reporter: Jon Meredith


There are a few issues that slow the in-JVM dtests from reclaiming metaspace once the cluster is closed.

IsolatedExecutor issues the shutdown on a SingleExecutorThreadPool, sometimes this thread was still running 10s after the dtest cluster was closed.  Instead, switch to a ThreadPoolExecutor with a core pool size of 0 so that the thread executing the class loader close executes sooner.

If an OutboundTcpConnection is waiting to connect() and the endpoint is not answering, it has to wait for a timeout before it exits. Instead it should check the isShutdown flag and terminate early if shutdown has been requested.

In 3.0 and above, HintsCatalog.load uses java.nio.Files.list outside of a try-with-resources construct and leaks a file handle for the directory.  This doesn't matter for normal usage, it leaks a file handle for each dtest Instance created.

On trunk, Netty global event executor threads are still running and delay GC for the instance class loader.



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)

---------------------------------------------------------------------
To unsubscribe, e-mail: commits-unsubscribe@cassandra.apache.org
For additional commands, e-mail: commits-help@cassandra.apache.org