[COCOON-1034] [PATCH] Persistent store or cache corruption?

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.1.8
• Component/s: * Cocoon Core
• Environment: Operating System: All; Platform: Macintosh
• Bugzilla Id: 26753
• Assignee: Unassigned
• Reporter: Bertrand Delacretaz
• Created: 07/Feb/04 21:33
• Updated: 02/May/13 02:28
• Resolved: 25/Oct/05 02:09

Description

This looks serious and I don't know much about the internals of the caching
system, so I'll try to provide as much info as possible.

This might be hard to reproduce - I was playing with the "System Tools And
Pages", and, during two different runs, pages became corrupted. However,
similar problems occured in two different runs of Cocoon.

First run:
-Start Cocoon
-Start LinkStatus sample, http://localhost:8888/samples/linkstatus, takes a long
time to run
-While LinkStatus sample runs, play with the "clear cache" and "clear store" links

At some point the http://localhost:8888/ became corrupted, Cocoon serves garbage
which looks like raw content from the cache.

Second run:
-Start Cocoon, LinkStatus sample, play with "clear cache" and "clear store"

At some point the docs index page (http://localhost:8888/docs/index.html) gets
corrupted, looks like raw content from the cache.

Them, calling http://localhost:8888/samples/clearcache.html takes much longer
than usual, many exceptions on the console (but not in the logs):

key = KeyObject, pos = 1662521
java.io.EOFException
        at java.io.RandomAccessFile.readByte(RandomAccessFile.java:564)
        at
com.coyotegulch.jisp.ObjectDatabaseFile.readObject(ObjectDatabaseFile.java:367)
        at
com.coyotegulch.jisp.IndexedObjectDatabase.read(IndexedObjectDatabase.java:244)
        at
org.apache.excalibur.store.impl.AbstractJispFilesystemStore.doGet(AbstractJispFilesystemStore.java:137)
        at
org.apache.excalibur.store.impl.AbstractReadWriteStore.get(AbstractReadWriteStore.java:103)
        at
org.apache.cocoon.generation.StatusGenerator.genVMStatus(StatusGenerator.java:300)
        at
org.apache.cocoon.generation.StatusGenerator.genStatus(StatusGenerator.java:199)
        at
org.apache.cocoon.generation.StatusGenerator.generate(StatusGenerator.java:165)
        at
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.processXMLPipeline(AbstractProcessingPipeline.java:579)
        at
org.apache.cocoon.components.pipeline.impl.AbstractCachingProcessingPipeline.processXMLPipeline(AbstractCachingProcessingPipeline.java:196)
        at
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.process(AbstractProcessingPipeline.java:523)


Then use http://localhost:8888/samples/clearpersistentstore.html
Takes more than 30 seconds, no exceptions.

Everything is then back to normal, docs index page is correct, clear cache and
clear store pages are quick again.

Issue Links

• depends upon: COCOON-971 [Roadmap] General - NEXT release