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[HDFS-4387] libhdfs doesn't work with jamVM - HDFS - [issue]
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...Building and running tests on OpenJDK 7 on Ubuntu 12.10 fails with mvn test -Pnative. The output is hard to decipher but the underlying issue is that test_libhdfs_native segfaults at s...
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http://issues.apache.org/jira/browse/HDFS-4387
Author: Andy Isaacson,
2013-05-13, 18:46
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[HDFS-3934] duplicative dfs_hosts entries handled wrong - HDFS - [issue]
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...A dead DN listed in dfs_hosts_allow.txt by IP and in dfs_hosts_exclude.txt by hostname ends up being displayed twice in dfsnodelist.jsp?whatNodes=DEAD after the NN restarts because getDatano...
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http://issues.apache.org/jira/browse/HDFS-3934
Author: Andy Isaacson,
2013-05-01, 22:04
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[HDFS-4253] block replica reads get hot-spots due to NetworkTopology#pseudoSortByDistance - HDFS - [issue]
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...When many nodes (10) read from the same block simultaneously, we get asymmetric distribution of read load. This can result in slow block reads when one replica is serving most of the r...
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http://issues.apache.org/jira/browse/HDFS-4253
Author: Andy Isaacson,
2013-03-05, 07:25
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[HDFS-4439] umask-mode does not support 4-digit umask value - HDFS - [issue]
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...Best practice for specifying file permissions using the legacy octal format is to always add a leading "0" to ensure the value is treated as octal. However the fs.permissions.umask-mod...
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http://issues.apache.org/jira/browse/HDFS-4439
Author: Andy Isaacson,
2013-02-26, 07:33
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[HDFS-3919] MiniDFSCluster:waitClusterUp can hang forever - HDFS - [issue]
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...A test run hung due to a known system config issue, but the hang was interesting:2012-09-11 13:22:41,888 WARN hdfs.MiniDFSCluster (MiniDFSCluster.java:waitClusterUp(925)) - Waiting for...
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http://issues.apache.org/jira/browse/HDFS-3919
Author: Andy Isaacson,
2013-02-06, 17:05
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[HDFS-4197] SNN JMX is lacking checkpoint info - HDFS - [issue]
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...The SecondaryNameNode status.jsp page contains the following:SecondaryNameNode StatusName Node Address : snn1/172.29.122.91:50020Start Time : ...
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http://issues.apache.org/jira/browse/HDFS-4197
Author: Andy Isaacson,
2013-02-02, 14:51
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Re: Dell Hardware - HDFS - [mail # user]
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...On Thu, Jan 31, 2013 at 8:53 AM, Artem Ervits wrote: The R720 supports up to 2 xeon CPUs and 8 drives in 2U. If configured appropriately it will work fine as a Hadoop node. For e...
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Author: Andy Isaacson,
2013-01-31, 19:13
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Re: Problems - HDFS - [mail # user]
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...Some of the unit tests fail with 1.7. HDFS and MR mostly work OK, but if you run into problems with 1.7 the first question will be "does it work in 1.6?". -andy On Thu, Jan 17, 2...
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Author: Andy Isaacson,
2013-01-17, 22:40
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Re: Some mappers are much slower than others in reading data from HDFS - HDFS - [mail # user]
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...It's hard to speculate on the minimal information you've provided so far. Seems like it's time to break out the performance analysis toolkit and see what's going on differently between the f...
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Author: Andy Isaacson,
2013-01-14, 21:40
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[HDFS-4335] dfs -mkdir /foo reports "/" rather than "/foo" in error output - HDFS - [issue]
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...ubuntu@ubu-cdh-0:~$ hdfs dfs -mkdir /foomkdir: Permission denied: user=ubuntu, access=WRITE, inode="/":hdfs:hadoop:drwxr-xr-xIt would be better if the Permission Denied message included the ...
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http://issues.apache.org/jira/browse/HDFS-4335
Author: Andy Isaacson,
2012-12-22, 02:28
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