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http://jira.magnolia-cms.com/browse/MAGNOLIA-2662?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Henryk Paluch updated MAGNOLIA-2662:
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Attachment:
config.modules.cache.config.configurations.default.cachePolicy.voters.urls.excludes.dmsNoCache.xml
config.modules.cache.config.configurations.default.cachePolicy.voters.urls.excludes.dmsNoCache.xml
Workaround example:
Do not cache items from "dms" repository.
We are using this workaround on our production system: It has about 4GB
documents, typical size of one documen is 5MB, some of them are 100MB long.
Heap size is 1.5GB
Without this workaround that system stop working with OutOfMemoryError after a
while.
> info.magnolia.module.cache.executor.Store causes OutOfMemoryError on large
> dms repositories
> -------------------------------------------------------------------------------------------
>
> Key: MAGNOLIA-2662
> URL: http://jira.magnolia-cms.com/browse/MAGNOLIA-2662
> Project: Magnolia
> Issue Type: Bug
> Components: cache
> Affects Versions: 3.6.3
> Environment: Magnolia 3.6.3 CE
> Environment1: Sun JDK 1.6.0_11, 32bit, RHEL 5.3Beta
> Environment2: Sun JDK 1.6.0_03,32bit, Windows 2000
> Reporter: Henryk Paluch
> Assignee: Boris Kraft
> Attachments:
> config.modules.cache.config.configurations.default.cachePolicy.voters.urls.excludes.dmsNoCache.xml,
> oom_stacktrace.txt
>
>
> magnolia-module-cache caches on public instance all data into byte[] array
> which easily causes OutofMemoryError on large repositories.
> NOTE: this error occures on Public instances only, whose has caching enabled!
> How to reproduce:
> 1) Start PUBLIC magnolia instance with Heap smaller than DMS repository size,
> for example -Xmx256m
> 2) Upload on PUBLIC instance few large files (for example 3 times 100MB PDF
> files)
> 3) Launch new anonymous browser (to ensure, that cache is used)
> 4) Download (do not interrupt) the 3 large 100MB large files from public
> instance
> 5) Usually the 2nd download will cause
> java.lang.OutOfMemoryError: Java heap space
> at java.util.Arrays.copyOf(Arrays.java:2786)
> at java.io.ByteArrayOutputStream.write(ByteArrayOutputStream.java:71)
> at
> info.magnolia.module.cache.filter.SimpleServletOutputStream.write(SimpleServletOutputStream.java:53)
> (Full stacktrace shall be attached later)
> Woraround: disable caching for large repositories (attachment pending)
> Possible solution: cache module should stream large files into disk rather
> than memory (as it did in 3.0.x version). This should prevent OutOfMemory
> error on large Document and or Website repositories.
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