[OAK-5915] NPE in LIRS cache

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Cannot Reproduce
• Affects Version/s: 1.8.0
• Fix Version/s: 1.8.0
• Component/s: cache, core
• Assignee: Thomas Mueller
• Reporter: Michael Dürig
• Created: 09/Mar/17 09:05
• Updated: 12/Jan/18 12:00
• Resolved: 10/May/17 14:21

Description

While experimenting with a snapshot of a production repository I hit an NPE in the LIRS cache:

java.lang.NullPointerException
  org.apache.jackrabbit.oak.cache.CacheLIRS$Segment.removeFromStack(CacheLIRS.java:1333)
  org.apache.jackrabbit.oak.cache.CacheLIRS$Segment.access(CacheLIRS.java:907)
  org.apache.jackrabbit.oak.cache.CacheLIRS$Segment.get(CacheLIRS.java:880)
  org.apache.jackrabbit.oak.cache.CacheLIRS.getIfPresent(CacheLIRS.java:372)
  org.apache.jackrabbit.oak.segment.ReaderCache.get(ReaderCache.java:116)
  org.apache.jackrabbit.oak.segment.CachingSegmentReader.readString(CachingSegmentReader.java:90)
  org.apache.jackrabbit.oak.segment.Segment.readTemplate(Segment.java:567)
  org.apache.jackrabbit.oak.segment.CachingSegmentReader$2.apply(CachingSegmentReader.java:118)
  org.apache.jackrabbit.oak.segment.CachingSegmentReader$2.apply(CachingSegmentReader.java:114)
  org.apache.jackrabbit.oak.segment.ReaderCache.get(ReaderCache.java:118)
  org.apache.jackrabbit.oak.segment.CachingSegmentReader.readTemplate(CachingSegmentReader.java:114)
  org.apache.jackrabbit.oak.segment.SegmentNodeState.getTemplate(SegmentNodeState.java:102)
  org.apache.jackrabbit.oak.segment.SegmentNodeState.getChildNodeEntries(SegmentNodeState.java:439)

Unfortunately no further information or ways to reproduce this.

FYI tmueller