[HBASE-5672] TestLruBlockCache#testBackgroundEvictionThread fails occasionally

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.94.6, 0.95.0
• Hadoop Flags: Reviewed
• Assignee: Chunhui Shen
• Reporter: Chunhui Shen
• Created: 29/Mar/12 03:18
• Updated: 04/Jun/13 00:01
• Resolved: 26/Apr/12 17:04

Description

We find TestLruBlockCache#testBackgroundEvictionThread fails occasionally.

I think it's a problem of the test case.
Because runEviction() only do evictionThread.evict():

public void evict() {
      synchronized(this) {
        this.notify(); // FindBugs NN_NAKED_NOTIFY
      }
    }

However when we call evictionThread.evict(), the evictionThread may haven't been in run() in the TestLruBlockCache#testBackgroundEvictionThread.

If we run the test many times, we could find failture easily.