hadoop2 JAVA_HOME is not set and could not be found
啟動yarn的報錯JAVA_HOME not set的處理辦法
問題: JAVA_HOME is not set
解決辦法:
新增兩處:
1.$HADOOP_HOME/etc/hadoop/yarn-env.sh
中新增:
--------------------------------上面新增------
export JAVA_HOME=/usr/java/jdk1.7.0_55
if [ "$JAVA_HOME" != "" ]; then
#echo "run java in $JAVA_HOME"
JAVA_HOME=$JAVA_HOME
fi
if [ "$JAVA_HOME" = "" ]; then
echo "Error: JAVA_HOME is not set."
exit 1
fi
--------------------------------------------------------------------
export JAVA_HOME=/usr/java/jdk1.7.0_55 (根據自己jdk 的路徑來設定)
2. $HADOOP_HOME/libexec/hadoop-config.sh
----------------------------下面新增:
# 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 JAVA_HOME=/usr/java/jdk1.7.0_55
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