[OAK-4107] NPE in MongoDocumentStore.determineServerTimeDifferenceMillis

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 1.5.2, 1.6.0
• Component/s: mongomk
• Assignee: Stefan Egli
• Reporter: Chetan Mehrotra
• Created: 09/Mar/16 05:08
• Updated: 05/Nov/19 14:46
• Resolved: 22/Apr/16 08:26

Description

On system startup with Mongo following exception is seen

07.03.2016 06:26:10.529 *WARN* [FelixStartLevel] org.apache.jackrabbit.oak.plugins.document.DocumentNodeStoreService registerNodeStore: got RuntimeException while trying to determine time difference to server: java.lang.NullPointerException
java.lang.NullPointerException: null
	at org.apache.jackrabbit.oak.plugins.document.mongo.MongoDocumentStore.determineServerTimeDifferenceMillis(MongoDocumentStore.java:1568)
	at org.apache.jackrabbit.oak.plugins.document.util.LeaseCheckDocumentStoreWrapper.determineServerTimeDifferenceMillis(LeaseCheckDocumentStoreWrapper.java:203)
	at org.apache.jackrabbit.oak.plugins.document.DocumentNodeStoreService.registerNodeStore(DocumentNodeStoreService.java:514)
	at org.apache.jackrabbit.oak.plugins.document.DocumentNodeStoreService.registerNodeStoreIfPossible(DocumentNodeStoreService.java:371)
	at org.apache.jackrabbit.oak.plugins.document.DocumentNodeStoreService.bindBlobStore(DocumentNodeStoreService.java:554)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)

Per code serverLocalTime appears to be null

 final Date serverLocalTime = db.command("serverStatus").getDate("localTime");
        final long end = System.currentTimeMillis();

        final long midPoint = (start + end) / 2;
        final long serverLocalTimeMillis = serverLocalTime.getTime();

Issue Links

• relates to: OAK-4515 Catch NPE and log serverResult in MongoDocumentStore.determineServerTimeDifferenceMillis