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[HDFS-6984] In Hadoop 3, make FileStatus no longer a Writable - HDFS - [issue]
...FileStatus was a Writable in Hadoop 2 and earlier.  Originally, we used this to serialize it and send it over the wire.  But in Hadoop 2 and later, we have the protobuf HdfsFileSta...
http://issues.apache.org/jira/browse/HDFS-6984    Author: Colin Patrick McCabe, 2014-09-05, 20:11
[HDFS-6036] Forcibly timeout misbehaving DFSClients that try to do no-checksum reads that extend too long - HDFS - [issue]
...We should forcibly timeout misbehaving DFSClients that try to do no-checksum reads that extend too long....
http://issues.apache.org/jira/browse/HDFS-6036    Author: Colin Patrick McCabe, 2014-09-04, 03:55
[HDFS-6993] Add a metric for the number of misbehaving DFSClients that try to do no-checksum reads that extend too long - HDFS - [issue]
...Add a metric on the DataNode for the number of misbehaving DFSClients that try to do no-checksum reads that extend too long....
http://issues.apache.org/jira/browse/HDFS-6993    Author: Colin Patrick McCabe, 2014-09-04, 03:21
[HDFS-6867] For DFSOutputStream, do pipeline recovery for a single block in the background - HDFS - [issue]
...For DFSOutputStream, we should be able to do pipeline recovery in the background, while the user is continuing to write to the file.  This is especially useful for long-lived clients th...
http://issues.apache.org/jira/browse/HDFS-6867    Author: Colin Patrick McCabe, 2014-09-03, 21:50
[HDFS-3592] libhdfs should use ClientProtocol::rename2 - HDFS - [issue]
...It would be nice if libhdfs exposed rename2.  This version of rename is much more verbose about any errors that occur-- it throws AccessControlException, FileAlreadyExists, FileNotFound...
http://issues.apache.org/jira/browse/HDFS-3592    Author: Colin Patrick McCabe, 2014-09-03, 20:28
[HDFS-6956] Allow dynamically changing the tracing level in Hadoop servers - HDFS - [issue]
...We should allow users to dynamically change the tracing level in Hadoop servers.  The easiest way to do this is probably to have an RPC accessible only to the superuser that changes tra...
http://issues.apache.org/jira/browse/HDFS-6956    Author: Colin Patrick McCabe, 2014-09-03, 00:37
[HDFS-6985] Add final keywords, documentation, etc. to ReplaceDatanodeOnFailure - HDFS - [issue]
...use final qualifier and variable names consistently in ReplaceDatanodeOnFailure#Condition classes add a debug log message in the DFSClient explaining which pipeline failure policy is being u...
http://issues.apache.org/jira/browse/HDFS-6985    Author: Colin Patrick McCabe, 2014-09-02, 23:46
[HDFS-6800] Support Datanode layout changes with rolling upgrade - HDFS - [issue]
...We need to handle attempts to rolling-upgrade the DataNode to a new storage directory layout.One approach is to disallow such upgrades.  If we choose this approach, we should make sure ...
http://issues.apache.org/jira/browse/HDFS-6800    Author: Colin Patrick McCabe, 2014-09-01, 22:44
[HDFS-6917] Add an hdfs debug command to validate blocks, call recoverlease, etc. - HDFS - [issue]
...HDFS should have a debug command which could validate HDFS block files, call recoverLease, and have some other functionality.  These commands would be purely for debugging and would app...
http://issues.apache.org/jira/browse/HDFS-6917    Author: Colin Patrick McCabe, 2014-08-28, 06:23
[HDFS-6957] Allow DFSClient to manually specify that a request should be traced - HDFS - [issue]
...Allow the DFSClient to manually specify that a request should be traced.  One easy way to do this might be to have a configuration property that the DFSClient reads which causes it to m...
http://issues.apache.org/jira/browse/HDFS-6957    Author: Colin Patrick McCabe, 2014-08-27, 22:04
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