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From "Michael McCandless (JIRA)" <>
Subject [jira] Created: (SOLR-2019) Jetty sometimes randomly takes a long time to start
Date Wed, 28 Jul 2010 14:47:18 GMT
Jetty sometimes randomly takes a long time to start

                 Key: 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:

It seems to be caused by this root cause:

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 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

However, it's still not clear how widespread / what evns this issue really affects (besides

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