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https://jira.duraspace.org/browse/DS-1396?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=26979#comment-26979
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Ian Boston commented on DS-1396:
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Also tried rng-tools and haveged
haveged doesn't increase the available entropy.
rng-tools wired back to /dev/urandom does, (to about 2K bits) bit it drops back
very quickly to < 100 on starting tomcat.
( cat /proc/sys/kernel/random/entropy_avail shows bits of entropy available)
Are there any settings in DSpace that would allow me to use a PRNG instead of
having to use the hardware one ?
> Very slow startup on Linux Platforms
> ------------------------------------
>
> Key: DS-1396
> URL: https://jira.duraspace.org/browse/DS-1396
> Project: DSpace
> Issue Type: Bug
> Affects Versions: 3.0
> Environment: Linux version 2.6.32-38-server (buildd@allspice) (gcc
> version 4.4.3 (Ubuntu 4.4.3-4ubuntu5) )
> /usr/lib/jvm/java-6-sun/bin/java
> -Djava.util.logging.config.file=/usr/local/tomcat7/conf/logging.properties
> -Djava.awt.headless=true -Djava.security.egd=file:/dev/./urandom -Xms256m
> -Xmx800m -XX:PermSize=256m -XX:NewSize=64m -server -XX:+UseConcMarkSweepGC
> -Djava.net.preferIPv4Stack=true
> -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager
> -Djava.endorsed.dirs=/usr/local/tomcat7/endorsed -classpath
> /usr/local/tomcat7/bin/bootstrap.jar:/usr/local/tomcat7/bin/tomcat-juli.jar
> -Dcatalina.base=/usr/local/tomcat7 -Dcatalina.home=/usr/local/tomcat7
> -Djava.io.tmpdir=/tmp/tomcat7-tmp org.apache.catalina.startup.Bootstrap start
> Reporter: Ian Boston
> Priority: Critical
>
> I am experiencing extremely slow startup times for DS3-rc3 on Linux with the
> stock sun JVM, and I have experienced total hangs 11:19-15:09 of the JVM with
> perfect operation after the end of the period (no restart of any form was
> required). By slow startup I mean just bringing up solr, xmlui and jspui can
> take 60 minutes.
> I think this is due to /dev/ramdom on the OS not getting sufficient entropy,
> probably caused by the Bouncy Castle crypto APIs or the new SecureRandom() in
> Eperson.
> performing a
> find /
> as root appears to unstick the JVM on startup, pointing to an entropy issue
> (find / will cause disk I/O not from cache generating low level device driver
> entropy)
> Has anyone else seen these issues ?
> Is there a known fix (other than performing a find)
> I have already tried -Djava.security.egd=file:/dev/./urandom
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