Hello,
my DSpace repository is 1.8.0 with XMLUI and Discovery enabled.
I've been having a problem with it every few days - DSpace stops
responding and Tomcat has to be restarted. The following error is
logged many times:
SEVERE: Exception unloading sessions to persistent storage
java.io.FileNotFoundException:
/var/lib/tomcat6/work/Catalina/localhost/_/SESSIONS.ser (Too many open
files)
at java.io.FileOutputStream.open(Native Method)
at java.io.FileOutputStream.<init>(FileOutputStream.java:209)
at java.io.FileOutputStream.<init>(FileOutputStream.java:99)
at
org.apache.catalina.session.StandardManager.doUnload(StandardManager.java:495)
at
org.apache.catalina.session.StandardManager$PrivilegedDoUnload.run(StandardManager.java:89)
at java.security.AccessController.doPrivileged(Native Method)
at
org.apache.catalina.session.StandardManager.unload(StandardManager.java:458)
at
org.apache.catalina.session.StandardManager.stop(StandardManager.java:673)
at
org.apache.catalina.core.StandardContext.stop(StandardContext.java:4774)
at
org.apache.catalina.core.StandardContext.reload(StandardContext.java:3385)
at
org.apache.catalina.loader.WebappLoader.backgroundProcess(WebappLoader.java:426)
at
org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1309)
at
org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1601)
at
org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1610)
at
org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1610)
at
org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1590)
at java.lang.Thread.run(Thread.java:636)
I tried to google for the error and found much about "Too many open
files" in Tomcat and even DSpace, but this particular error "Exception
unloading sessions to persistent storage" seems to be unique.
cat /proc/sys/fs/file-max
101728
Is there someone who can help me debug this issue? Thanks.
Regards,
~~helix84
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