Jetty sometimes randomly takes a long time to start
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Key: SOLR-2019
URL: https://issues.apache.org/jira/browse/SOLR-2019
Project: Solr
Issue Type: Bug
Reporter: Michael McCandless
Fix For: 3.1, 4.0
I'm hitting this Jetty issue when running Solr's tests that spawn a Jetty:
http://jira.codehaus.org/browse/JETTY-331
It seems to be caused by this root cause:
http://bugs.sun.com/view_bug.do?bug_id=6202721
Whereby, somehow, Jetty is trying to use cryptographically secure source of
randomness to seed seed its HashSessionIdManager. My box doesn't have enough
entropy so the read blocks for sometimes 10s of seconds!
If I forcefully symlink /dev/random -> /dev/urandom, that fixes the hang.
Likewise, if I edit the JRE's java.security to set
securerandom.source=file:/dev/./urandom, that also fixes it. But I think we
can workaround this more "generally" by doing the workaround suggested in the
Jetty issue (pass java.util.Random not java.security.SecureRandom).
However, it's still not clear how widespread / what evns this issue really
affects (besides mine)...
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