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[HDFS-3440] should more effectively limit stream memory consumption when reading corrupt edit logs - HDFS - [issue]
...Currently, we do in.mark(100MB) before reading an opcode out of the edit log.  However, this could result in us usin all of those 100 MB when reading bogus data, which is not what we wa...
http://issues.apache.org/jira/browse/HDFS-3440    Author: Colin Patrick McCabe, 2014-03-03, 19:16
[HDFS-5938] Make BlockReaderFactory#BlockReaderPeer a static class - HDFS - [issue]
...Make BlockReaderFactory#BlockReaderPeer a static class to avoid a findbugs warning....
http://issues.apache.org/jira/browse/HDFS-5938    Author: Colin Patrick McCabe, 2014-02-13, 14:53
[HDFS-5940] Minor cleanups to ShortCircuitReplica, FsDatasetCache, and DomainSocketWatcher - HDFS - [issue]
...ShortCircuitReplica#Key and FsDatasetCache#Key are pretty much identical code and should be factored out to an external class.  (There will soon be a need for a third user of such an id...
http://issues.apache.org/jira/browse/HDFS-5940    Author: Colin Patrick McCabe, 2014-02-13, 14:53
[HDFS-4911] Reduce PeerCache timeout to be commensurate with dfs.datanode.socket.reuse.keepalive - HDFS - [issue]
...The default timeout for the client's PeerCache is much longer than the DataNode would possibly keep the socket open.  Specifically, dfs.client.socketcache.expiryMsec defaults to 2 *60 *...
http://issues.apache.org/jira/browse/HDFS-4911    Author: Colin Patrick McCabe, 2014-02-07, 14:52
[HDFS-5746] add ShortCircuitSharedMemorySegment - HDFS - [issue]
...Add ShortCircuitSharedMemorySegment, which will be used to communicate information between the datanode and the client about whether a replica is mlocked....
http://issues.apache.org/jira/browse/HDFS-5746    Author: Colin Patrick McCabe, 2014-02-07, 14:52
[HDFS-5182] BlockReaderLocal must allow zero-copy  reads only when the DN believes it's valid - HDFS - [issue]
...BlockReaderLocal must allow zero-copy reads only when the DN believes it's valid.  This implies adding a new field to the response to REQUEST_SHORT_CIRCUIT_FDS.  We also need some ...
http://issues.apache.org/jira/browse/HDFS-5182    Author: Colin Patrick McCabe, 2014-02-05, 22:37
[HDFS-5164] deleteSnapshot should check if OperationCategory.WRITE is possible before taking write lock - HDFS - [issue]
...deleteSnapshot should check if OperationCategory.WRITE is possible before taking the write lock, to help avoid lock contention...
http://issues.apache.org/jira/browse/HDFS-5164    Author: Colin Patrick McCabe, 2014-01-28, 23:36
[HDFS-5666] Fix inconsistent synchronization in BPOfferService - HDFS - [issue]
...TestBPOfferService#testBPInitErrorHandling fails intermittently.  We believe it's because of inconsistent synchronization in BPOfferService.stack trace:Regressionorg.apache.hadoop.hdfs....
http://issues.apache.org/jira/browse/HDFS-5666    Author: Colin Patrick McCabe, 2014-01-28, 23:36
[HDFS-5534] change testUncachingBlocksBeforeCachingFinishes to use explicit synchronization rather than a delay - HDFS - [issue]
...It would be nice for testUncachingBlocksBeforeCachingFinishes to use explicit synchronization rather than a delay, to ensure that we are testing the try-to-cache-but-uncache-before-it-finish...
http://issues.apache.org/jira/browse/HDFS-5534    Author: Colin Patrick McCabe, 2014-01-22, 21:58
[HDFS-5092] Add support for incremental cache reports - HDFS - [issue]
...The initial cacheReport patch at HDFS-5051 does frequent full reports of DN cache state. Better would be a scheme similar to how block reports are currently done: send incremental cache repo...
http://issues.apache.org/jira/browse/HDFS-5092    Author: Colin Patrick McCabe, 2014-01-22, 21:56
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