Hanging thread on shutdown in Tomcat

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The abstract Redis instance contains a single thread pool:

private final ExecutorService executor = Executors.newSingleThreadExecutor();

This creates a non daemon thread and there is no call to executor.shutdown() in the stop method. As such this causes an appserver with an embedded redis server to hang.

[kstyrc]

Hmm, valid case. Thanks for pointing out I'll try to make ExecutorService running daemon threads.