[ASTERIXDB-1251] NPE at NC startup after upgrade

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Component/s: MTD - Metadata
• Assignee: Murtadha Makki Al Hubail
• Reporter: Yingyi Bu
• Created: 06/Jan/16 18:38
• Updated: 27/Jan/16 06:24
• Resolved: 27/Jan/16 06:24

Description

I upgraded my instance to latest master but got this exception:

java.lang.NullPointerException
        at org.apache.asterix.metadata.bootstrap.MetadataBootstrap.enlistMetadataDataset(MetadataBootstrap.java:412)
        at org.apache.asterix.metadata.bootstrap.MetadataBootstrap.startUniverse(MetadataBootstrap.java:199)
        at org.apache.asterix.hyracks.bootstrap.NCApplicationEntryPoint.notifyStartupComplete(NCApplicationEntryPoint.java:235)
        at org.apache.hyracks.control.nc.NodeControllerService.start(NodeControllerService.java:311)
        at org.apache.hyracks.control.nc.NCDriver.main(NCDriver.java:48)

It seems related to the recent global resource id changes.
But failing the instance forever seems not the right answer for that case. To me, the bottomline is that the instance can at least start (with warnings in the log saying which datasets are lost) though the old data could lose, so that a user doesn't need to reinstall a new instance.