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From "Anoop Sam John (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-16696) TestBlockEvictionFromClient fails in master branch
Date Fri, 23 Sep 2016 17:08:20 GMT

    [ https://issues.apache.org/jira/browse/HBASE-16696?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15516995#comment-15516995
] 

Anoop Sam John commented on HBASE-16696:
----------------------------------------

Is this a flaky test from long time?
{code}
ScanThread[] scanThreads = initiateScan(table, true);
      Thread.sleep(200);
      Iterator<CachedBlock> iterator = cache.iterator();
      boolean usedBlocksFound = false;
      int refCount = 0;
      int noOfBlocksWithRef = 0;
      while (iterator.hasNext()) {
        CachedBlock next = iterator.next();
        BlockCacheKey cacheKey = new BlockCacheKey(next.getFilename(), next.getOffset());
        if (cache instanceof BucketCache) {
          refCount = ((BucketCache) cache).getRefCount(cacheKey);
        } else if (cache instanceof CombinedBlockCache) {
          refCount = ((CombinedBlockCache) cache).getRefCount(cacheKey);
        } else {
          continue;
        }
        if (refCount != 0) {
          // Blocks will be with count 3
          System.out.println("The refCount is " + refCount);
          assertEquals(NO_OF_THREADS, refCount);
{code}
3 scanner threads were started and we sleep for 200 msec and then assert that blocks have
3 as ref count.  What is a scan got completed in btw?  Then that ref count dec would have
happened.   Ping [~ram_krish]


> TestBlockEvictionFromClient fails in master branch
> --------------------------------------------------
>
>                 Key: HBASE-16696
>                 URL: https://issues.apache.org/jira/browse/HBASE-16696
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Ted Yu
>         Attachments: build-1638.out, build-1639.out
>
>
> TestBlockEvictionFromClient consistently fails in master branch.
> From existing Jenkins builds, looks like this started with build 1639.
> See attached Jenkins console logs.



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