背景

我电脑环境的jdk是1.7，而需要的版本为1.8. 因此需要给elasticsearch指定jdk1.8（不需要将jdk1.8配置到环境变量）.

一、下载

• 1、jdk:点击下载jdk1.8
• 2、解压

tar -xvf xxx1.8.tar.gz

二、配置

• 1、修改elasticsearch启动脚本
  打开 elasticsearchHOME/bin/elasticsearch 编辑

[root]# vim bin/elasticsearch # 添加以下代码 export JAVA_HOME=/home/hiekay/jdk1.8.0_181/ （此处配置的为刚下的1.8的配置目录） export PATH=$JAVA_HOME/bin:$PATH if [ -x "$JAVA_HOME/bin/java" ]; then JAVA="/home/yutao/jdk1.8.0_121/bin/java" else JAVA=`which java` fi 

完整配置文件

#!/bin/bash # CONTROLLING STARTUP: # # This script relies on a few environment variables to determine startup # behavior, those variables are: # # ES_PATH_CONF -- Path to config directory # ES_JAVA_OPTS -- External Java Opts on top of the defaults set # # Optionally, exact memory values can be set using the `ES_JAVA_OPTS`. Note that # the Xms and Xmx lines in the JVM options file must be commented out. Example # values are "512m", and "10g". # # ES_JAVA_OPTS="-Xms8g -Xmx8g" ./bin/elasticsearch #配置自己的jdk1.8 export JAVA_HOME=/home/hiekay/jdk1.8.0_181/ export PATH=$JAVA_HOME/bin:$PATH source "`dirname "$0"`"/elasticsearch-env ES_JVM_OPTIONS="$ES_PATH_CONF"/jvm.options JVM_OPTIONS=`"$JAVA" -cp "$ES_CLASSPATH" org.elasticsearch.tools.launchers.JvmOptionsParser "$ES_JVM_OPTIONS"` ES_JAVA_OPTS="${JVM_OPTIONS//\$\{ES_TMPDIR\}/$ES_TMPDIR} $ES_JAVA_OPTS" #我添加的jdk判断 if [ -x "$JAVA_HOME/bin/java" ]; then JAVA="/home/hiekay/jdk1.8.0_181/bin/java" else JAVA=`which java` fi cd "$ES_HOME" # manual parsing to find out, if process should be detached if ! echo $* | grep -E '(^-d |-d$| -d |--daemonize$|--daemonize )' > /dev/null; then exec \ "$JAVA" \ $ES_JAVA_OPTS \ -Des.path.home="$ES_HOME" \ -Des.path.conf="$ES_PATH_CONF" \ -Des.distribution.flavor="$ES_DISTRIBUTION_FLAVOR" \ -Des.distribution.type="$ES_DISTRIBUTION_TYPE" \ -cp "$ES_CLASSPATH" \ org.elasticsearch.bootstrap.Elasticsearch \ "$@" else exec \ "$JAVA" \ $ES_JAVA_OPTS \ -Des.path.home="$ES_HOME" \ -Des.path.conf="$ES_PATH_CONF" \ -Des.distribution.flavor="$ES_DISTRIBUTION_FLAVOR" \ -Des.distribution.type="$ES_DISTRIBUTION_TYPE" \ -cp "$ES_CLASSPATH" \ org.elasticsearch.bootstrap.Elasticsearch \ "$@" \ <&- & retval=$? pid=$! [ $retval -eq 0 ] || exit $retval if [ ! -z "$ES_STARTUP_SLEEP_TIME" ]; then sleep $ES_STARTUP_SLEEP_TIME fi if ! ps -p $pid > /dev/null ; then exit 1 fi exit 0 fi exit $?