Cask CDAP服务已启动，但在安装期间未运行。

Question

在浏览了用于在MapR系统(v6.0)上安装CDAP并启动cdap服务的文档之后，我发现一些CDAP服务在启动(https://docs.cask.co/cdap/current/en/admin-manual/installation/mapr.html#starting-cdap-services)后没有运行，尽管服务的启动循环没有显示任何错误。启动服务并检查其状态后的输出如下所示：

[root@mapr007 conf]# for i in `ls /etc/init.d/ | grep cdap` ; do sudo service $i start ; done
/usr/bin/id: cannot find name for group ID 504
Wed Nov 21 16:03:01 HST 2018 Starting CDAP Auth Server service on mapr007.org.local


/usr/bin/id: cannot find name for group ID 504
Wed Nov 21 16:03:04 HST 2018 Starting CDAP Kafka Server service on mapr007.org.local


/usr/bin/id: cannot find name for group ID 504
Wed Nov 21 16:03:07 HST 2018 Starting CDAP Master service on mapr007.org.local


Warning: Unable to determine $DRILL_HOME
Wed Nov 21 16:03:48 HST 2018 Ensuring required HBase coprocessors are on HDFS
Wed Nov 21 16:04:00 HST 2018 Running CDAP Master startup checks -- this may take a few minutes
/usr/bin/id: cannot find name for group ID 504
Wed Nov 21 16:04:15 HST 2018 Starting CDAP Router service on mapr007.org.local


/usr/bin/id: cannot find name for group ID 504
Wed Nov 21 16:04:17 HST 2018 Starting CDAP UI service on mapr007.org.local



[root@mapr007 conf]# for i in `ls /etc/init.d/ | grep cdap` ; do sudo service $i status ; done
/usr/bin/id: cannot find name for group ID 504
PID file /var/cdap/run/auth-server-cdap.pid exists, but process 12126 does not appear to be running
/usr/bin/id: cannot find name for group ID 504
CDAP Kafka Server running as PID 12653
/usr/bin/id: cannot find name for group ID 504
PID file /var/cdap/run/master-cdap.pid exists, but process 15789 does not appear to be running
/usr/bin/id: cannot find name for group ID 504
CDAP Router running as PID 16184
/usr/bin/id: cannot find name for group ID 504
CDAP UI running as PID 16308

请注意，虽然存在“无法确定$DRILL_HOME”错误，但我认为这不应该是一个大问题，因为已经在cdap-site.xml中添加和设置了explore.enabled值为false。查看cdap-site.xml，尽管web UI端口报告为运行，但它似乎被设置为默认的11011，但却无法看到它(如果只是检查UI是否会告诉我更多关于错误的信息)。

查看一些有关PID的信息，看到

# looking at the process that report to not be running
[root@mapr007 conf.dist]# ps -p 12126
  PID TTY          TIME CMD
[root@mapr007 conf.dist]# ps -p 15789
  PID TTY          TIME CMD

# looking at the rest of the processes
[root@mapr007 conf.dist]# ps -p 12653
  PID TTY          TIME CMD
12653 ?        00:08:12 java
[root@mapr007 conf.dist]# ps -p 16184
  PID TTY          TIME CMD
16184 ?        00:03:02 java
[root@mapr007 conf.dist]# ps -p 16308
  PID TTY          TIME CMD
16308 ?        00:00:01 node

还检查其他服务是否正在使用默认的security.auth.server.bind.port。

root@mapr007 conf.dist]# netstat -anp | grep 10009

但什么也没发现。

不知道从哪里开始调试，因此如果有任何建议或信息将不胜感激。

更新

重新启动服务，尝试获取更多的日志数据，现在看到了一些错误(我想，总比它只是不抱怨，然后不起作用好)

[root@mapr007 conf.dist]# for i in `ls /etc/init.d/ | grep cdap` ; do sudo service $i stop ; done
/usr/bin/id: cannot find name for group ID 504
Mon Nov 26 11:06:29 HST 2018 Stopping CDAP Auth Server ...
/usr/bin/id: cannot find name for group ID 504
Mon Nov 26 11:06:29 HST 2018 Stopping CDAP Kafka Server ....

/usr/bin/id: cannot find name for group ID 504
Mon Nov 26 11:06:30 HST 2018 Stopping CDAP Master ...
/usr/bin/id: cannot find name for group ID 504
Mon Nov 26 11:06:31 HST 2018 Stopping CDAP Router ....

/usr/bin/id: cannot find name for group ID 504
Mon Nov 26 11:06:32 HST 2018 Stopping CDAP UI ....

[root@mapr007 conf.dist]# for i in `ls /etc/init.d/ | grep cdap` ; do sudo service $i start ; done
/usr/bin/id: cannot find name for group ID 504
Mon Nov 26 11:06:41 HST 2018 Starting CDAP Auth Server service on mapr007.org.local

/usr/bin/id: cannot find name for group ID 504
Mon Nov 26 11:06:44 HST 2018 Starting CDAP Kafka Server service on mapr007.org.local

/usr/bin/id: cannot find name for group ID 504
Mon Nov 26 11:06:47 HST 2018 Starting CDAP Master service on mapr007.org.local

Warning: Unable to determine $DRILL_HOME
Mon Nov 26 11:07:17 HST 2018 Ensuring required HBase coprocessors are on HDFS
Mon Nov 26 11:08:57 HST 2018 Running CDAP Master startup checks -- this may take a few minutes
[ERROR] Master startup checks failed. Please check /var/log/cdap/master-cdap-mapr007.org.local.log to address issues.
/usr/bin/id: cannot find name for group ID 504
Mon Nov 26 11:10:08 HST 2018 Starting CDAP Router service on mapr007.org.local

/usr/bin/id: cannot find name for group ID 504
Mon Nov 26 11:10:11 HST 2018 Starting CDAP UI service on mapr007.org.local

检查/var/log/cdap/master-cdap-mapr007.org.local.log文件的内容，在底部可以看到

...
...
...
2018-11-26 11:10:06,996 - ERROR [main:c.c.c.m.s.MasterStartupTool@109] - YarnCheck failed with RuntimeException: Unable to get status of YARN nodemanagers. Please check that YARN is running and that the correct Hadoop configuration (core-site.xml, yarn-site.xml) and libraries are included in the CDAP master classpath.
java.lang.RuntimeException: Unable to get status of YARN nodemanagers. Please check that YARN is running and that the correct Hadoop configuration (core-site.xml, yarn-site.xml) and libraries are included in the CDAP master classpath.
    at co.cask.cdap.master.startup.YarnCheck.run(YarnCheck.java:79) ~[co.cask.cdap.cdap-master-5.1.0.jar:na]
    at co.cask.cdap.common.startup.CheckRunner.runChecks(CheckRunner.java:51) ~[co.cask.cdap.cdap-common-5.1.0.jar:na]
    at co.cask.cdap.master.startup.MasterStartupTool.canStartMaster(MasterStartupTool.java:106) [co.cask.cdap.cdap-master-5.1.0.jar:na]
    at co.cask.cdap.master.startup.MasterStartupTool.main(MasterStartupTool.java:96) [co.cask.cdap.cdap-master-5.1.0.jar:na]
Caused by: java.util.concurrent.TimeoutException: null
    at java.util.concurrent.FutureTask.get(FutureTask.java:205) ~[na:1.8.0_181]
    at co.cask.cdap.master.startup.YarnCheck.run(YarnCheck.java:76) ~[co.cask.cdap.cdap-master-5.1.0.jar:na]
    ... 3 common frames omitted
2018-11-26 11:10:07,006 - ERROR [main:c.c.c.m.s.MasterStartupTool@113] -   Root cause: TimeoutException: 
2018-11-26 11:10:07,006 - ERROR [main:c.c.c.m.s.MasterStartupTool@116] - Errors detected while starting up master. Please check the logs, address all errors, then try again.

遵循“分布式CDAP上的CDAP服务由于异常而没有启动。我应该做什么？”FAQ在文档中似乎没有帮助(https://docs.cask.co/cdap/current/en/faqs/cdap.html#cdap-services-on-distributed-cdap-aren-t-starting-up-due-to-an-exception-what-should-i-do)。

将继续调试，但希望对这些新错误有任何意见。

Answer 1

重新启动集群上的资源管理器和节点管理器服务似乎解决了此错误。这主要是根据另一个开发人员的猜测完成的，这只是基于以下事实:尽管集群的RM和NM服务运行良好，但CDAP无法连接到纱线。

此外，CDAP安装文档用于启用kerberose (https://docs.cask.co/cdap/current/en/admin-manual/installation/mapr.html#enabling-kerberos)指定使用一个特殊的关键字_HOST，例如。

<property>
  <name>cdap.master.kerberos.keytab</name>
  <value>/etc/security/keytabs/cdap.service.keytab</value>
</property>

<property>
  <name>cdap.master.kerberos.principal</name>
  <value><cdap-principal>/_HOST@EXAMPLE.COM</value>
</property>

其中_HOST不仅是一些文档占位符，而且是一些应该自动填充的特殊关键字(例如。见https://mapr.com/docs/60/Hive/Config-HiveMetastoreForKerberos.html和https://mapr.com/docs/60/SecurityGuide/Config-YARN-Kerberos.html)。

显然，对于MapR 客户机节点(即。非控制或数据节点(节点只运行MapR客户端包与集群交互)，这不起作用，而且必须显式地给出kerberos原则服务器主机名(非常肯定文档存在，但此时找不到)。这是在进一步检查日志并看到CDAP服务试图连接到_HOST@us.org而不是the.actual.domain@us.org时发现的。