Home | About | Sematext search-lucene.com search-hadoop.com
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
clear query|facets|time Search criteria: .   Results from 1 to 10 from 45 (0.152s).
Loading phrases to help you
refine your search...
[HDFS-7521] Refactor DN state management - HDFS - [issue]
...There are two aspects w.r.t. DN state management in NN. State machine management within active NNNN maintains states of each data node regarding whether it is running or being decommissioned...
http://issues.apache.org/jira/browse/HDFS-7521    Author: Ming Ma, 2014-12-23, 01:03
[HDFS-7182] JMX metrics aren't accessible when NN is busy - HDFS - [issue]
...HDFS-5693 has addressed all NN JMX metrics in hadoop 2.0.5. Since then couple new metrics have been added. It turns out "RollingUpgradeStatus" requires FSNamesystem read lock....
http://issues.apache.org/jira/browse/HDFS-7182    Author: Ming Ma, 2014-12-20, 15:29
[HDFS-7541] Support for fast HDFS datanode rolling upgrade - HDFS - [issue]
...Current HDFS DN rolling upgrade step requires sequential DN restart to minimize the impact on data availability and read/write operations. The side effect is longer upgrade duration for larg...
http://issues.apache.org/jira/browse/HDFS-7541    Author: Ming Ma, 2014-12-17, 19:57
[HDFS-6425] Large postponedMisreplicatedBlocks has impact on blockReport latency - HDFS - [issue]
...Sometimes we have large number of over replicates when NN fails over. When the new active NN took over, over replicated blocks will be put to postponedMisreplicatedBlocks until all DNs for t...
http://issues.apache.org/jira/browse/HDFS-6425    Author: Ming Ma, 2014-12-17, 15:41
[HDFS-7518] Heartbeat processing doesn't have to take FSN readLock - HDFS - [issue]
...NameNode takes global read lock when it process heartbeat RPCs from DataNodes. This increases lock contention and could impact NN overall throughput. Given Heartbeat processing needs to acce...
http://issues.apache.org/jira/browse/HDFS-7518    Author: Ming Ma, 2014-12-13, 07:17
[HDFS-7491] Add incremental blockreport latency to DN metrics - HDFS - [issue]
...In a busy cluster, IBR processing could be delayed due to NN FSNamesystem lock and cause NN to throw NotReplicatedYetException to DFSClient and thus increase the overall application latency....
http://issues.apache.org/jira/browse/HDFS-7491    Author: Ming Ma, 2014-12-12, 23:17
[HDFS-7400] More reliable namenode health check to detect OS/HW issues - HDFS - [issue]
...We had this scenario on an active NN machine. Disk array controller firmware has a bug. So disks stop working. ZKFC and NN still considered the node healthy; Communications between ZKFC and ...
http://issues.apache.org/jira/browse/HDFS-7400    Author: Ming Ma, 2014-12-12, 21:38
[HDFS-7441] More accurate detection for slow node in HDFS write pipeline - HDFS - [issue]
...A DN could be slow due to OS or HW issues. HDFS write pipeline sometimes couldn't detect the slow DN correctly. Detection for "slow node" might not be specific to HDFS write pipeline. When a...
http://issues.apache.org/jira/browse/HDFS-7441    Author: Ming Ma, 2014-12-08, 19:22
[HDFS-7281] Missing block is marked as corrupted block - HDFS - [issue]
...In the situation where the block lost all its replicas, fsck shows the block is missing as well as corrupted. Perhaps it is better not to mark the block corrupted in this case. The reason it...
http://issues.apache.org/jira/browse/HDFS-7281    Author: Ming Ma, 2014-12-08, 17:54
[HDFS-5757] refreshNodes with many nodes at the same time could slow down NN - HDFS - [issue]
...Sometimes we need to decomm a whole rack of nodes at the same time. When the decomm is in process; NN is slow.The reason is when DecommissionManager checks the decomm status, it acquires nam...
http://issues.apache.org/jira/browse/HDFS-5757    Author: Ming Ma, 2014-12-06, 06:20
Sort:
project
HDFS (45)
YARN (17)
Hadoop (11)
HBase (8)
MapReduce (6)
Hive (1)
type
issue (45)
date
last 7 days (2)
last 30 days (12)
last 90 days (22)
last 6 months (38)
last 9 months (45)
author
Todd Lipcon (326)
Harsh J (264)
Eli Collins (263)
Colin Patrick McCabe (254)
Tsz Wo (201)
Jing Zhao (182)
Haohui Mai (176)
Chris Nauroth (175)
Arpit Agarwal (155)
Andrew Wang (150)
Brandon Li (143)
Aaron T. Myers (142)
Suresh Srinivas (140)
Kihwal Lee (122)
Daryn Sharp (110)
Ted Yu (100)
Uma Maheswara Rao G (87)
Tsz Wo Nicholas Sze (80)
Alejandro Abdelnur (73)
Konstantin Shvachko (69)
Yongjun Zhang (66)
Akira AJISAKA (61)
Stephen Chu (59)
Steve Loughran (57)
Allen Wittenauer (56)
Ming Ma
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