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[HDFS-4298] StorageRetentionManager spews warnings when used with QJM - HDFS - [issue]
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...When the NN is configured with a QJM, we see the following warning message every time a checkpoint is made or uploaded:12/12/10 16:07:52 WARN namenode.FSEditLog: Unable to determine input st...
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http://issues.apache.org/jira/browse/HDFS-4298
Author: Todd Lipcon,
2013-05-23, 15:06
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[HDFS-3875] Issue handling checksum errors in write pipeline - HDFS - [issue]
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...We saw this issue with one block in a large test cluster. The client is storing the data with replication level 2, and we saw the following: the second node in the pipeline detects a checksu...
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http://issues.apache.org/jira/browse/HDFS-3875
Author: Todd Lipcon,
2013-05-22, 15:07
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[HDFS-4833] Corrupt blocks are not invalidated when first processing repl queues - HDFS - [issue]
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...When the NN processes misreplicated blocks in processMisReplicatedBlock (eg during initial startup when first processing repl queues), it does not invalidate corrupt replicas unless the bloc...
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http://issues.apache.org/jira/browse/HDFS-4833
Author: Todd Lipcon,
2013-05-16, 22:05
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[HDFS-4828] Make QJM epoch-related errors more understandable - HDFS - [issue]
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...Since we started running QJM on production clusters, we've found that users are very confused by some of the error messages that it produces. For example, when a failover occurs and an old N...
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http://issues.apache.org/jira/browse/HDFS-4828
Author: Todd Lipcon,
2013-05-16, 19:14
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[HDFS-4305] Add a configurable limit on number of blocks per file, and min block size - HDFS - [issue]
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...We recently had an issue where a user set the block size very very low and managed to create a single file with hundreds of thousands of blocks. This caused problems with the edit log since ...
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http://issues.apache.org/jira/browse/HDFS-4305
Author: Todd Lipcon,
2013-05-15, 22:49
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[HDFS-4300] TransferFsImage.downloadEditsToStorage should use a tmp file for destination - HDFS - [issue]
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...Currently, in TransferFsImage.downloadEditsToStorage, we download the edits file directly to its finalized path. So, if the transfer fails in the middle, a half-written file is left and cann...
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http://issues.apache.org/jira/browse/HDFS-4300
Author: Todd Lipcon,
2013-05-14, 15:06
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[HDFS-3653] 1.x: Add a retention period for purged edit logs - HDFS - [issue]
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...Occasionally we have a bug which causes something to go wrong with edits files. Even more occasionally the bug is such that the namenode mistakenly deletes an edits file without merging it i...
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http://issues.apache.org/jira/browse/HDFS-3653
Author: Todd Lipcon,
2013-05-14, 06:12
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[HDFS-1172] Blocks in newly completed files are considered under-replicated too quickly - HDFS - [issue]
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...I've seen this for a long time, and imagine it's a known issue, but couldn't find an existing JIRA. It often happens that we see the NN schedule replication on the last block of files very q...
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http://issues.apache.org/jira/browse/HDFS-1172
Author: Todd Lipcon,
2013-05-14, 05:53
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[HDFS-3751] DN should log warnings for lengthy disk IOs - HDFS - [issue]
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...Occasionally failing disks or other OS-and-below issues cause a single IO to take tens of seconds, or even minutes in the case of failures. This often results in timeout exceptions at the cl...
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http://issues.apache.org/jira/browse/HDFS-3751
Author: Todd Lipcon,
2013-05-14, 05:47
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[HDFS-4799] Corrupt replica can be prematurely removed from corruptReplicas map - HDFS - [issue]
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...We saw the following sequence of events in a cluster result in losing the most recent genstamp of a block: client is writing to a pipeline of 3 the pipeline had nodes fail over some period o...
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http://issues.apache.org/jira/browse/HDFS-4799
Author: Todd Lipcon,
2013-05-11, 15:06
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