[OAK-1524] NPE in TarMK flush thread

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 0.19
• Component/s: core
• Assignee: Jukka Zitting
• Reporter: Chetan Mehrotra
• Created: 11/Mar/14 07:18
• Updated: 24/Mar/14 13:36
• Resolved: 11/Mar/14 18:22

Description

Following exception is seen at times with SegmentStore

unning org.apache.jackrabbit.oak.jcr.tck.NodetypeIT
Exception in thread "TarMK flush thread: target/tar.1303694685400657" java.lang.NullPointerException
        at org.apache.jackrabbit.oak.plugins.segment.file.FileStore.flush(FileStore.java:237)
        at org.apache.jackrabbit.oak.plugins.segment.file.FileStore$1.run(FileStore.java:196)
        at java.lang.Thread.run(Thread.java:662)

Looking at FileStore#L237 [1] segments might be null when memoryMapped mode is used (default). Possibly a null check is required there

[1] https://github.com/apache/jackrabbit-oak/blob/trunk/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/segment/file/FileStore.java#L237