通過cloudera manager 5.x添加spark服務，在創建服務過程中，發現spark服務創建失敗，可以通過控制台錯誤輸出看到如下日志信息：
| + perl -pi -e 's#{{CMF_CONF_DIR}}#/etc/spark/conf.cloudera.spark_on_yarn/yarn-conf#g' /opt/cm-5.9.2/run/cloudera-scm-agent/process/ccdeploy_spark-conf_etcsparkconf.cloudera.spark_on_yarn_1615663591259519890/spark-conf/yarn-conf/yarn-site.xml ++ get_default_fs /opt/cm-5.9.2/run/cloudera-scm-agent/process/ccdeploy_spark-conf_etcsparkconf.cloudera.spark_on_yarn_1615663591259519890/spark-conf/yarn-conf ++ get_hadoop_conf /opt/cm-5.9.2/run/cloudera-scm-agent/process/ccdeploy_spark-conf_etcsparkconf.cloudera.spark_on_yarn_1615663591259519890/spark-conf/yarn-conf fs.defaultFS ++ local conf=/opt/cm-5.9.2/run/cloudera-scm-agent/process/ccdeploy_spark-conf_etcsparkconf.cloudera.spark_on_yarn_1615663591259519890/spark-conf/yarn-conf ++ local key=fs.defaultFS ++ '[' 1 == 1 ']' ++ /opt/cloudera/parcels/CDH-5.9.2-1.cdh5.9.2.p0.3/lib/hadoop/../../bin/hdfs --config /opt/cm-5.9.2/run/cloudera-scm-agent/process/ccdeploy_spark-conf_etcsparkconf.cloudera.spark_on_yarn_1615663591259519890/spark-conf/yarn-conf getconf -confKey fs.defaultFS Exception in thread "main" java.lang.UnsupportedClassVersionError: org/apache/hadoop/hdfs/tools/GetConf : Unsupported major.minor version 51.0 at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:643) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at java.net.URLClassLoader.defineClass(URLClassLoader.java:277) at java.net.URLClassLoader.access$000(URLClassLoader.java:73) at java.net.URLClassLoader$1.run(URLClassLoader.java:212) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:205) at java.lang.ClassLoader.loadClass(ClassLoader.java:323) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294) at java.lang.ClassLoader.loadClass(ClassLoader.java:268) Could not find the main class: org.apache.hadoop.hdfs.tools.GetConf. Program will exit. + DEFAULT_FS= |
根據輸出日志信息大致可以判斷這是因為jdk版本導致的添加spark服務失敗。因為這是我全權安裝的環境，所以印象中jdk版本是滿足cm5安裝要求的，我這里使用的是jdk1.7.0_67，如下：
| # java -version java version "1.7.0_67" Java(TM) SE Runtime Environment (build 1.7.0_67-b01) Java HotSpot(TM) 64-Bit Server VM (build 24.65-b04, mixed mode) You have new mail in /var/spool/mail/root |
針對於目前java版本並沒有問題，滿足當前安裝的cm5版本要求。所以判斷可能是因為我是通過tar包方式安裝的java的原因，正常通過rpm包安裝應該沒有這個問題。下面驗證自己的猜測：
這里使用alternatives命令，alternatives命令通常用來管理服務器上的相同軟件多版本問題。
| --查看服務器java版本，發現jdk1.7.0_67沒有再服務器管理之下： [root@db01 ~]# alternatives --config java There are 2 programs which provide 'java'. Selection Command ----------------------------------------------- 1 /usr/lib/jvm/jre-1.5.0-gcj/bin/java *+ 2 /usr/lib/jvm/jre-1.6.0-openjdk.x86_64/bin/java Enter to keep the current selection[+], or type selection number: |
| --將jdk1.7.0_67添加到服務器管理中： [root@db01 ~]# alternatives --install /usr/bin/java java /opt/java/jdk1.7.0_67/bin/java 3 |
| --再次查看服務器java版本信息，並且調整優先級最高的為jdk1.7.0_67： [root@db01 ~]# alternatives --config java There are 3 programs which provide 'java'. Selection Command ----------------------------------------------- 1 /usr/lib/jvm/jre-1.5.0-gcj/bin/java *+ 2 /usr/lib/jvm/jre-1.6.0-openjdk.x86_64/bin/java 3 /opt/java/jdk1.7.0_67/bin/java Enter to keep the current selection[+], or type selection number: 3 |
| [root@db01 ~]# alternatives --config java There are 3 programs which provide 'java'. Selection Command ----------------------------------------------- 1 /usr/lib/jvm/jre-1.5.0-gcj/bin/java * 2 /usr/lib/jvm/jre-1.6.0-openjdk.x86_64/bin/java + 3 /opt/java/jdk1.7.0_67/bin/java Enter to keep the current selection[+], or type selection number: |
調整java版本信息后，再次添加spark服務，成功。
或者卸載原生的java版本，如：
# rpm -e java-1.5.0-gcj-1.5.0.0-29.1.el6.x86_64 java-1.6.0-openjdk-1.6.0.0-1.66.1.13.0.el6.x86_64 tzdata-java-2013g-1.el6.noarch java_cup-0.10k-5.el6.x86_64 java-1.6.0-openjdk-devel-1.6.0.0-1.66.1.13.0.el6.x86_64 gcc-java-4.4.7-4.el6.x86_64 --nodeps
如果以上方法不可用，采用以下方法，直接指定環境變量：
find / -type f -name "*cc.sh"
定位到/opt/program/cm-5.9.0/lib64/cmf/service/client/deploy-cc.sh
直接在上面加上
JAVA_HOME=/opt/java
export JAVA_HOME=/opt/java