Details
-
Bug
-
Status: Resolved
-
Major
-
Resolution: Not A Problem
-
2.0.0-alpha
-
None
-
None
Description
Scenario:
=========
Started NN with four DN's
written client program such that it will keep on write,append and read dta with 10 thread.
After 4 hours ,got OOME.Then DN listed under Dead it's not sending any heartbeats but GC is happening.
GC OPTS configured for DN
-Xms3G -Xmx4G -XX:NewSize=256M -XX:MaxNewSize=512M -XX:PermSize=128M -XX:MaxPermSize=128M -XX:CMSFullGCsBeforeCompaction=1 -XX:MaxDirectMemorySize=1G -XX:+UseConcMarkSweepGC -XX:+CMSParallelRemarkEnabled -XX:+UseCMSCompactAtFullCollection -XX:CMSInitiatingOccupancyFraction=65 -Xloggc:/home/install/hadoop/datanode/logs/datanode-root-gc.log -XX:+PrintGCDetails -XX:+DisableExplicitGC
CPU usage for DN
Tasks: 1 total, 0 running, 1 sleeping, 0 stopped, 0 zombie Cpu(s): 0.1%us, 0.0%sy, 0.0%ni, 99.8%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 15955M total, 15806M used, 148M free, 436M buffers Swap: 12284M total, 9M used, 12274M free, 11422M cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 7431 root 20 0 6291m 2.6g 13m S 0 16.4 55:20.65 java
JAVA Version
sun.boot.library.path = /root/nodesetup/java/jdk1.6.0_31/jre/lib/amd64 java version "1.6.0_31" Java(TM) SE Runtime Environment (build 1.6.0_31-b04) Java HotSpot(TM) 64-Bit Server VM (build 20.6-b01, mixed mode)