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From "Joe Kutner (JIRA)" <j...@apache.org>
Subject [jira] Created: (AMQ-1380) ActiveIO does not close ControlFile
Date Wed, 05 Sep 2007 16:17:22 GMT
ActiveIO does not close ControlFile 
------------------------------------

                 Key: AMQ-1380
                 URL: https://issues.apache.org/activemq/browse/AMQ-1380
             Project: ActiveMQ
          Issue Type: Bug
          Components: Broker
    Affects Versions: 4.1.1
         Environment: All
            Reporter: Joe Kutner
         Attachments: patch.txt

The following exception is thrown from an ActiveMQ instance that is in Slave mode that causes
it to crash.

java.io.FileNotFoundException: ***/*******/*****/*******/journal/control.dat (Too many open
files)
        at java.io.RandomAccessFile.open(Native Method)
        at java.io.RandomAccessFile.<init>(RandomAccessFile.java:212)
        at org.apache.activeio.journal.active.ControlFile.<init>(ControlFile.java:60)
        at org.apache.activeio.journal.active.LogFileManager.initialize(LogFileManager.java:119)
        at org.apache.activeio.journal.active.LogFileManager.<init>(LogFileManager.java:102)
        at org.apache.activeio.journal.active.JournalImpl.<init>(JournalImpl.java:101)
        at org.apache.activemq.store.DefaultPersistenceAdapterFactory.createJournal(DefaultPersistenceAdapterFactory.java:224)
        at org.apache.activemq.store.DefaultPersistenceAdapterFactory.getJournal(DefaultPersistenceAdapterFactory.java:132)
        at org.apache.activemq.store.DefaultPersistenceAdapterFactory.createPersistenceAdapter(DefaultPersistenceAdapterFactory.java:70)
        at org.apache.activemq.store.PersistenceAdapterFactoryBean.getObject(PersistenceAdapterFactoryBean.java:35)
        at org.springframework.beans.factory.support.AbstractBeanFactory.getObjectFromFactoryBean(AbstractBeanFactory.java:994)
        ... 41 more

The problem is that each time ActiveIO checks to see if control.dat is locked it creates a
new java.io.RandomAccessFile.  If the control.dat file is locked, it fails to close the RandomAccessFile.

This exception always will be thrown from an instance in Shared-File-System Slave mode that
continues to check the Journal file (which the Master has locked).  But the rate at which
is is thrown depends on the maximum number of files the OS allows to be open.  You can check
how many files are open with 'ulimit -a'

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