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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