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Posted to oak-issues@jackrabbit.apache.org by "Michael Dürig (JIRA)" <ji...@apache.org> on 2015/05/18 11:52:00 UTC

[jira] [Created] (OAK-2880) NPE in SegmentWriter.writeMap

Michael Dürig created OAK-2880:
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             Summary: NPE in SegmentWriter.writeMap
                 Key: OAK-2880
                 URL: https://issues.apache.org/jira/browse/OAK-2880
             Project: Jackrabbit Oak
          Issue Type: Bug
          Components: segmentmk
            Reporter: Michael Dürig
            Assignee: Michael Dürig
             Fix For: 1.3.0


Under some rare conditions which are not entirely clear yet {{SegmentWriter.writeMap}} results in a {{NPE}}:

{noformat}
java.lang.NullPointerException
	at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:192)
	at org.apache.jackrabbit.oak.plugins.segment.SegmentWriter.writeRecordId(SegmentWriter.java:366)
	at org.apache.jackrabbit.oak.plugins.segment.SegmentWriter.writeMapLeaf(SegmentWriter.java:417)
	at org.apache.jackrabbit.oak.plugins.segment.SegmentWriter.writeMapBucket(SegmentWriter.java:475)
	at org.apache.jackrabbit.oak.plugins.segment.SegmentWriter.writeMapBucket(SegmentWriter.java:511)
	at org.apache.jackrabbit.oak.plugins.segment.SegmentWriter.writeMap(SegmentWriter.java:711)
{noformat}

This happens when the {{base}} passed to {{writeMap(MapRecord base, Map<String, RecordId> changes)}} is not null but doesn't contain some of the keys *removed* through the updates provided in the passed {{changes}}. 



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