安装CDH6.2.1时cloudera-scm-server启动失败
安装CDH6.2.1，在使⽤systemctl start cloudera-scm-server启动，status查看时，启动失败。
查看/var/log/cloudera-scm-server  下没有⽇志
再查看服务相关的⽇志： journalctl -xe
报错为:
May 3111:12:37 hadoop102 cm-server[4564]: |  site:                                                              |
May 3111:12:37 hadoop102 cm-server[4564]: |  > acle/technetwork/java/javase/index.html <      |
May 3111:12:37 hadoop102 cm-server[4564]: | OR                                                                  |
May 3111:12:37 hadoop102 cm-server[4564]: | - a supported version of the OpenJDK from your OS vendor.  Help for  |
May 3111:12:37 hadoop102 cm-server[4564]: |  some OSes are available at:                                        |
exited
May 3111:12:37 hadoop102 cm-server[4564]: |  > openjdk.java/install/ <                              |
May 3111:12:37 hadoop102 cm-server[4564]: |                                                                      |
May 3111:12:37 hadoop102 cm-server[4564]: | Cloudera Manager requires Oracle JDK or OpenJDK 1.8 or later.        |
May 3111:12:37 hadoop102 cm-server[4564]: | NOTE: Cloudera Manager will find the Oracle JDK when starting,      |
May 3111:12:37 hadoop102 cm-server[4564]: |      regardless of whether you installed the JDK using a binary    |
May 3111:12:37 hadoop102 cm-server[4564]: |      installer or the RPM-based installer.                          |
May 3111:12:37 hadoop102 cm-server[4564]: +======================================================================+
May 3111:12:37 hadoop102 systemd[1]: cloudera-scm-server.service: main process exited, code=exited, status=1/FAILURE
May 3111:12:37 hadoop102 systemd[1]: Unit cloudera-scm-server.service entered failed state.
May 3111:12:37 hadoop102 systemd[1]: cloudera-scm-server.service failed.
May 3111:12:37 hadoop102 systemd[1]: cloudera-scm-server.service holdoff time over, scheduling restart.
May 3111:12:37 hadoop102 systemd[1]: Stopped Cloudera CM Server Service.
-- Subject: Unit cloudera-scm-server.service has finished shutting down
-- Defined-By: systemd
-- Support: /mailman/listinfo/systemd-devel
--
-- Unit cloudera-scm-server.service has finished shutting down.
May 3111:12:37 hadoop102 systemd[1]: start request repeated too quickly for cloudera-scm-server.service
May 3111:12:37 hadoop102 systemd[1]: Failed to start Cloudera CM Server Service.
-- Subject: Unit cloudera-scm-server.service has failed
-- Defined-By: systemd
-- Support: /mailman/listinfo/systemd-devel
--
-- Unit cloudera-scm-server.service has failed.
--
-- The result is failed.
May 3111:12:37 hadoop102 systemd[1]: Unit cloudera-scm-server.service entered failed state.
May 3111:12:37 hadoop102 systemd[1]: cloudera-scm-server.service failed.
May 3111:12:51 hadoop102 polkitd[752]: Registered Authentication Agent for unix-process:4602:104
6407 (system bus name :1.92 [/usr/bin/pkttyagent --not May 3111:12:51 hadoop102 polkitd[752]: Unregistered Authentication Agent for unix-process:4602:1046407 (system bus name :1.92, object path /org/freede 是因为jdk的版本不对，要下载cdh6.2.1⾃带的oracle-j2sdk1.8-1.8.0+update181-1.x86_64.rpm包。

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