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https://issues.apache.org/jira/browse/HBASE-4874?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13157378#comment-13157378
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Lars Hofhansl commented on HBASE-4874:
--------------------------------------
This happens at least on Linux when SecureRandom is used.
SecureRandom used /dev/random in Linux, which will block if not enough entropy
has been gathered by system events (disk, network, keyboard, mouse movements,
etc).
It's *not* only testClosing. Every time a test cluster is started it might
hang, if the system happens to run out of entropy its to generated secure
random numbers. I've seen the same with TestFromClient and other tests that
start an actual cluster for the test.
The fix I found was to add "-Djava.security.egd=file:/dev/./urandom" (note the
extra ./ in path is needed for JDK 1.5 or newer) to the command line.
> TestHCM#testClosing fails if not enough entropy is available
> ------------------------------------------------------------
>
> Key: HBASE-4874
> URL: https://issues.apache.org/jira/browse/HBASE-4874
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.92.0
> Reporter: Ted Yu
>
> TestHCM#testClosing fails if not enough entropy is available
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