[HBASE-9025] Potential Thread safety issue in MetaScanner

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Cannot Reproduce
• Affects Version/s: 0.94.9
• Assignee: Unassigned
• Reporter: Lars Hofhansl
• Created: 23/Jul/13 05:14
• Updated: 16/Jun/22 17:45
• Resolved: 08/Dec/13 05:11

Description

I just saw this in a test run in 0.94:

Stacktrace

java.lang.NullPointerException
	at java.util.TreeMap.getEntry(TreeMap.java:324)
	at java.util.TreeMap.get(TreeMap.java:255)
	at org.apache.hadoop.hbase.util.TestHBaseFsck.testSplitDaughtersNotInMeta(TestHBaseFsck.java:1346)
...

The TreeMap in question here is actually returned from HTable.getRegionLocations(), which in turns calls MetaScanner.allTableRegions(getConfiguration(), getTableName(), false);