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[HDFS-559] Work out the memory consumption of NN artifacts on a compressed pointer JVM - HDFS - [issue]
...Following up HADOOP-1687, it would be nice to know the size of datatypes in under the java16u14 JVM, which offers compressed pointers....
http://issues.apache.org/jira/browse/HDFS-559    Author: Steve Loughran, 2014-07-23, 22:45
[HDFS-151] Not all of DfsClient's operations check the FS is open before calling the remote system - HDFS - [issue]
...DFSClient.getDiskStatus() doesn't call checkOpen() before use; there look to be a few other operations that behave similarly. This may not be what was intended....
http://issues.apache.org/jira/browse/HDFS-151    Author: Steve Loughran, 2014-07-22, 22:21
[HDFS-353] DFSClient does not always throw a FileNotFound exception when a file could not be opened - HDFS - [issue]
...DfsClient.openInit() throws an IOE when a file can't be found, that is, it has no blocks[sf-startdaemon-debug] 09/02/16 12:38:47 [IPC Server handler 0 on 8012] INFO mapred.Ta...
http://issues.apache.org/jira/browse/HDFS-353    Author: Steve Loughran, 2014-07-22, 19:19
[HDFS-351] Could FSEditLog report problems more elegantly than with System.exit(-1) - HDFS - [issue]
...When FSEdit encounters problems, it prints something and then exits.It would be better for any in-JVM deployments of FSEdit for these to be raised in some other way (such as throwing an exce...
http://issues.apache.org/jira/browse/HDFS-351    Author: Steve Loughran, 2014-07-21, 22:49
[HDFS-301] Provide better error messages when fs.default.name is invalid - HDFS - [issue]
...this the followon to HADOOP-5687 - its not enough to detect bad uris, we need good error messages and a set of tests to make sure everything works as intended....
http://issues.apache.org/jira/browse/HDFS-301    Author: Steve Loughran, 2014-07-21, 20:22
[HDFS-286] Move Datanode packet IO logging to its own log - HDFS - [issue]
...If the Datanode is set to log at info, then the log fills up with lots of details about packet sending and receiving[sf-startdaemon-debug] 09/01/28 13:15:42 [org.apache.hadoop.hd...
http://issues.apache.org/jira/browse/HDFS-286    Author: Steve Loughran, 2014-07-21, 19:33
[HDFS-287] should Storage.unlockAll() work through the list of storageDirs before bailing out? - HDFS - [issue]
...Storage.unlockAll will forward any exception raised while trying to unlock a storage directory. However, it may be more robust to catch the exception and run through the remaining directorie...
http://issues.apache.org/jira/browse/HDFS-287    Author: Steve Loughran, 2014-07-19, 00:43
[HDFS-349] SecondaryNameNode could include the hostname/port in socket connect failures for better diagnostics - HDFS - [issue]
...reported on the user mailing list. when the Secondary name node can't connect to the default filesystem, it passes up the JVM error, which of course omits useful information such as the host...
http://issues.apache.org/jira/browse/HDFS-349    Author: Steve Loughran, 2014-07-18, 23:24
[HDFS-91] JSP pages don't disable caching - HDFS - [issue]
...None of the JSP pages disable caching. This is bad for long-haul diagnostics, as proxy servers may cache the content. Even if the remote cluster is down, the proxy may return the last-good s...
http://issues.apache.org/jira/browse/HDFS-91    Author: Steve Loughran, 2014-07-18, 21:01
[HDFS-335] improve singleton handling in DataNode - HDFS - [issue]
...when a DataNode is constructed, it saves its identity to a static field:datanodeObject=this;1. there's no check on what if this is already set2. when the datanode terminates, it may want to ...
http://issues.apache.org/jira/browse/HDFS-335    Author: Steve Loughran, 2014-07-18, 18:24
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