Hi... my site in production has been running and after our latest code
change we started to get the error below after a few days. It appears
it is something to do with wicket's PageMap. In the past this error
would come up after weeks or months of the app running [we were
re-starting tomcat fairly regularly back then]. The sys-admin of the
box said he increased the open file limit from 1024 to 65535 per the
following thread
[http://osdir.com/ml/users-wicket.apache.org/2009-09/msg00674.html ].
However this seems like a hack and not solving the underlying problem.
In fact we got the exception thrown even quicker after the file limit
change was made.
We are running wicket 1.4.3 [yes, it is an outdated version and moving
to 1.4.16 *may* solve the problem.]
Any ideas? What can we be doing wrong?
2011-03-03 15:42:26,681 | [] | ERROR (DiskPageStore.java:930) Error
flushing page
java.lang.RuntimeException: java.io.FileNotFoundException:
/usr/share/apache-tomcat-6.0.20/work/Catalina/localhost/_/wicket-spring-
hibernate-filestore/7815/9545/64D2A385CF347B9FF9074C8345CA99FB/pm-null
(Too many open files)
at
org.apache.wicket.protocol.http.pagestore.FileChannelPool.newFileChannel
(FileChannelPool.java:103)
at
org.apache.wicket.protocol.http.pagestore.FileChannelPool.getFileChannel
(FileChannelPool.java:170)
at
org.apache.wicket.protocol.http.pagestore.DiskPageStore$SessionEntry.sav
ePage(DiskPageStore.java:241)
at
org.apache.wicket.protocol.http.pagestore.DiskPageStore.flushPagesToSave
List(DiskPageStore.java:924)
at
org.apache.wicket.protocol.http.pagestore.DiskPageStore$PageSavingThread
.run(DiskPageStore.java:996)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.io.FileNotFoundException:
/usr/share/apache-tomcat-6.0.20/work/Catalina/localhost/_/wicket-spring-
hibernate-filestore/7815/9545/64D2A385CF347B9FF9074C8345CA99FB/pm-null
(Too many open files)
at java.io.RandomAccessFile.open(Native Method)
at java.io.RandomAccessFile.<init>(RandomAccessFile.java:212)
at
org.apache.wicket.protocol.http.pagestore.FileChannelPool.newFileChannel
(FileChannelPool.java:98)
... 5 more
