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https://issues.apache.org/jira/browse/HADOOP-5412?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12679416#action_12679416
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Hairong Kuang commented on HADOOP-5412:
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I've run the test for 50 times back to back without hitting the infinite loop.
Previously I saw the loop before the 20th run.
> TestInjectionForSimulatedStorage oaccasionally fails on timeout
> ---------------------------------------------------------------
>
> Key: HADOOP-5412
> URL: https://issues.apache.org/jira/browse/HADOOP-5412
> Project: Hadoop Core
> Issue Type: Bug
> Affects Versions: 0.18.3
> Reporter: Hairong Kuang
> Assignee: Hairong Kuang
> Fix For: 0.18.4
>
> Attachments: simulatedLoop.patch
>
>
> Occasionally TestInjectionForSimulatedStorage falls into an infinite loop,
> waiting for a block to reach its replication factor. The log repeatedly
> prints the following message:
> dfs.TestInjectionForSimulatedStorage
> (TestInjectionForSimulatedStorage.java:waitForBlockReplication(89)) - Not
> enough replicas for 2th block blk_6302924909504458109_1001 yet. Expecting 4,
> got 2.
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