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[HDFS-3643] hdfsJniHelper.c unchecked string pointers - HDFS - [issue]
...    str = methSignature;    while (*str != ')') str++;    str++;    returnType = *str;This loop needs to check for '\0'. Also the ...
http://issues.apache.org/jira/browse/HDFS-3643    Author: Andy Isaacson, 2015-05-03, 00:02
[HDFS-4253] block replica reads get hot-spots due to NetworkTopology#pseudoSortByDistance - HDFS - [issue]
...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...
http://issues.apache.org/jira/browse/HDFS-4253    Author: Andy Isaacson, 2015-05-02, 21:00
[HDFS-4439] umask-mode does not support 4-digit umask value - HDFS - [issue]
...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...
http://issues.apache.org/jira/browse/HDFS-4439    Author: Andy Isaacson, 2015-05-02, 11:40
[HDFS-4139] fuse-dfs RO mode still allows file truncation - HDFS - [issue]
...Mounting a fuse-dfs in readonly mode with "-oro" still allows the user to truncate files.$ grep fuse /etc/fstabhadoop-fuse-dfs#dfs://ubu-cdh-0.local /export/hdfs fuse noauto,ro 0 0$ sudo mou...
http://issues.apache.org/jira/browse/HDFS-4139    Author: Andy Isaacson, 2015-03-13, 23:14
[HDFS-4284] BlockReaderLocal not notified of failed disks - HDFS - [issue]
...When a DN marks a disk as bad, it stops using replicas on that disk.However a long-running BlockReaderLocal instance will continue to access replicas on the failing disk.Somehow we should le...
http://issues.apache.org/jira/browse/HDFS-4284    Author: Andy Isaacson, 2014-09-05, 23:17
[HDFS-4329] DFSShell issues with directories with spaces in name - HDFS - [issue]
...This bug was discovered by Casey Ching.The command dfs -put /foo/hello.txt dir is supposed to create dir/hello.txt on HDFS.  It doesn't work right if "dir" has a space in it:[adi@haus01...
http://issues.apache.org/jira/browse/HDFS-4329    Author: Andy Isaacson, 2014-09-04, 00:41
[HDFS-3934] duplicative dfs_hosts entries handled wrong - HDFS - [issue]
...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...
http://issues.apache.org/jira/browse/HDFS-3934    Author: Andy Isaacson, 2014-09-04, 00:02
[HDFS-4205] fsck fails with symlinks - HDFS - [issue]
...I created a symlink using...    FileContext fc = FileContext.getFileContext(dst.fs.getUri());    for (PathData src : srcs) {      fc.createS...
http://issues.apache.org/jira/browse/HDFS-4205    Author: Andy Isaacson, 2014-09-03, 23:58
[HDFS-3815] CorruptBlocks documentation is misleading - HDFS - [issue]
...In FSNamesystem.java we have  /** Returns number of blocks with corrupt replicas */  @Metric({"CorruptBlocks", "Number of blocks with corrupt replicas"})The CorruptBlocks...
http://issues.apache.org/jira/browse/HDFS-3815    Author: Andy Isaacson, 2014-07-29, 19:50
[HDFS-3828] Block Scanner rescans blocks too frequently - HDFS - [issue]
...BlockPoolSliceScanner#scan calls cleanUp every time it's invoked from DataBlockScanner#run via scanBlockPoolSlice.  But cleanUp unconditionally roll()s the verificationLogs, so after tw...
http://issues.apache.org/jira/browse/HDFS-3828    Author: Andy Isaacson, 2014-04-29, 15:44
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB