Question

浏览了在MapR系统（v6.0）上安装CDAP并启动cdap服务的文档后，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）后仍未运行，尽管该服务的启动循环未显示任何错误。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，但我认为这应该不是大问题，因为已经在cdap-site.xml中添加并设置了explore.enabled值是假的。查看cdap-site.xml，Web UI端口的确设置为默认的11011，但看不到它（如果只是检查UI是否会告诉我更多有关错误的信息），尽管事实上报告运行。

检查有关PID的一些信息，请参见

# 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使用了默认的security.auth.server.bind.port

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

但未检测到任何东西。

不确定从何处开始调试，因此，任何建议或信息将不胜感激。

更新

重新启动服务以尝试获取更多的日志数据，现在看到了一些错误（我猜这不仅仅只是抱怨而不是然后不工作）

[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.

由于出现异常，“分布式CDAP上的 CDAP服务未启动。我该怎么办？”文档中的常见问题似乎没有帮助（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，但希望您对这些新错误有任何意见。

Answer 1

重新启动群集上的Resource Manager和Node Manager服务似乎已解决此错误。这主要是由另一位开发人员基于一个错误的猜测完成的，该错误仅与以下事实有关：尽管群集的RM和NM服务运行良好，但该错误与CDAP无法连接到YARN有关。

此外，用于启用kerberose（https://docs.cask.co/cdap/current/en/admin-manual/installation/mapr.html#enabling-kerberos）的CDAP安装文档使用特殊的关键字_HOST指定，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不仅仅是一些文档占位符，而是一些应该自动填写的特殊关键字（例如，参见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 client 节点（即非控制节点或数据节点（仅运行MapR客户端软件包以与群集进行交互的节点）），这是行不通的，也是kerberos原则必须明确指定服务器主机名（非常确定文档存在，但目前无法找到）。在进一步检查日志并发现CDAP服务试图连接到_HOST@us.org而不是说the.actual.domain@us.org时发现了这一点。

木桶CDAP服务已启动，但在安装过程中未运行

1 个答案: