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Posted to oak-issues@jackrabbit.apache.org by "Alex Parvulescu (JIRA)" <ji...@apache.org> on 2015/08/03 12:19:05 UTC
[jira] [Created] (OAK-3172) Unreleased closed sessions can keep a
root reference from getting collected
Alex Parvulescu created OAK-3172:
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Summary: Unreleased closed sessions can keep a root reference from getting collected
Key: OAK-3172
URL: https://issues.apache.org/jira/browse/OAK-3172
Project: Jackrabbit Oak
Issue Type: Sub-task
Components: segmentmk
Reporter: Alex Parvulescu
Assignee: Alex Parvulescu
It looks like even if a component logs out a session, but keeps a reference to it around this will still prevent GC from running, as the session will wrap a _root_ reference pointing to the moment/revision when the session was last accessed.
Extract from jvisualvm:
{code}
this - value: org.apache.jackrabbit.oak.plugins.segment.SegmentId #505
<- [106] - class: org.apache.jackrabbit.oak.plugins.segment.SegmentId[], value: org.apache.jackrabbit.oak.plugins.segment.SegmentId #505
<- refids - class: org.apache.jackrabbit.oak.plugins.segment.Segment, value: org.apache.jackrabbit.oak.plugins.segment.SegmentId[] #67 (120 items)
<- segment - class: org.apache.jackrabbit.oak.plugins.segment.SegmentId, value: org.apache.jackrabbit.oak.plugins.segment.Segment #81
<- [124] - class: org.apache.jackrabbit.oak.plugins.segment.SegmentId[], value: org.apache.jackrabbit.oak.plugins.segment.SegmentId #496
<- refids - class: org.apache.jackrabbit.oak.plugins.segment.Segment, value: org.apache.jackrabbit.oak.plugins.segment.SegmentId[] #17 (204 items)
<- segment - class: org.apache.jackrabbit.oak.plugins.segment.SegmentId, value: org.apache.jackrabbit.oak.plugins.segment.Segment #17
<- segmentId - class: org.apache.jackrabbit.oak.plugins.segment.SegmentNodeState, value: org.apache.jackrabbit.oak.plugins.segment.SegmentId #551
<- base - class: org.apache.jackrabbit.oak.plugins.segment.SegmentNodeBuilder, value: org.apache.jackrabbit.oak.plugins.segment.SegmentNodeState #5557
<- builder - class: org.apache.jackrabbit.oak.core.MutableRoot, value: org.apache.jackrabbit.oak.plugins.segment.SegmentNodeBuilder #5652
<- root - class: org.apache.jackrabbit.oak.jcr.repository.RepositoryImpl$1, value: org.apache.jackrabbit.oak.core.MutableRoot #151
<- sd - class: com.adobe.granite.repository.impl.CRX3SessionImpl, value: org.apache.jackrabbit.oak.jcr.repository.RepositoryImpl$1 #117
{code}
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