Author: mattf
Date: Tue Jul 24 07:27:53 2012
New Revision: 1364925
URL: http://svn.apache.org/viewvc?rev=1364925&view=rev
Log:
HADOOP-7154. Set MALLOC_ARENA_MAX in hadoop-env.sh. Contributed by Todd Lipcon.
Modified:
hadoop/common/branches/branch-1.1/CHANGES.txt
hadoop/common/branches/branch-1.1/bin/hadoop-config.sh
Modified: hadoop/common/branches/branch-1.1/CHANGES.txt
URL:
http://svn.apache.org/viewvc/hadoop/common/branches/branch-1.1/CHANGES.txt?rev=1364925&r1=1364924&r2=1364925&view=diff
==============================================================================
--- hadoop/common/branches/branch-1.1/CHANGES.txt (original)
+++ hadoop/common/branches/branch-1.1/CHANGES.txt Tue Jul 24 07:27:53 2012
@@ -137,6 +137,8 @@ Release 1.1.0 - 2012.07.09
HDFS-2465. Add HDFS support for fadvise readahead and drop-behind.
(todd via suresh)
+ HADOOP-7154. Should set MALLOC_ARENA_MAX in hadoop-env.sh
+ (todd via mattf)
BUG FIXES
Modified: hadoop/common/branches/branch-1.1/bin/hadoop-config.sh
URL:
http://svn.apache.org/viewvc/hadoop/common/branches/branch-1.1/bin/hadoop-config.sh?rev=1364925&r1=1364924&r2=1364925&view=diff
==============================================================================
--- hadoop/common/branches/branch-1.1/bin/hadoop-config.sh (original)
+++ hadoop/common/branches/branch-1.1/bin/hadoop-config.sh Tue Jul 24 07:27:53
2012
@@ -75,6 +75,11 @@ if [ "$HADOOP_HOME_WARN_SUPPRESS" = "" ]
echo 1>&2
fi
+# Newer versions of glibc use an arena memory allocator that causes virtual
+# memory usage to explode. This interacts badly with the many threads that
+# we use in Hadoop. Tune the variable down to prevent vmem explosion.
+export MALLOC_ARENA_MAX=${MALLOC_ARENA_MAX:-4}
+
export HADOOP_HOME=${HADOOP_PREFIX}
export HADOOP_HOME_WARN_SUPPRESS=1
