CDH Hive执行聚合函数报错return code 2 from org.apache.hadoop.hive.ql.exec.mr.MapRedTask脱坑指南

一、组件版本

我用的是CDH5.16.1，Hive版本是1.1.0

二、出现问题

1. 问题一

普通查询很正常但是聚合查询就会报错，然后去查找日志发现在本地没有\tmp\logs文件，这个文件是用来存放Yarn的log日志的地方，之后查看CDH文档发现yarn的job日志同一存放在【http://XXXX（自己的节点IP）:19888/jobhistory】中找到报错的job。打开发现报错如下：

2019-08-23 11:17:08,195 INFO [Thread-64] org.apache.hadoop.mapreduce.jobhistory.JobHistoryEventHandler: Stopped JobHistoryEventHandler. super.stop()
2019-08-23 11:17:08,197 INFO [Thread-64] org.apache.hadoop.mapreduce.v2.app.rm.RMContainerAllocator: Setting job diagnostics to The required MAP capability is more than the supported max container capability in the cluster. Killing the Job. mapResourceRequest:  maxContainerCapability:
Job received Kill while in RUNNING state.

标红处显示我设置的MAP最大内存已经超出系统可以接受的最大范围，于是去mapred-site.xml中修改如下信息（我的mapred-site.xml在/etc/hadoop/conf.cloudera.yarn/这个路径下）：

 
    mapreduce.map.memory.mb
    1024
 

 
    mapreduce.reduce.memory.mb
    1024
 

都改成了1024。

2. 问题二

再次执行发现还是报错不行，然后再看日志文件，发现报错信息如下：

2019-08-23 10:46:12,464 INFO [AsyncDispatcher event handler] org.apache.hadoop.mapreduce.v2.app.job.impl.TaskAttemptImpl: Diagnostics report from attempt_1566449689259_0001_m_000000_2: Error: java.lang.RuntimeException: Error in configuring object
	at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:109)
	at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:75)
	at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:133)
	at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:455)
	at org.apache.hadoop.mapred.MapTask.run(MapTask.java:343)
	at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:164)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.Subject.doAs(Subject.java:422)
	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1924)
	at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)
Caused by: java.lang.reflect.InvocationTargetException
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:106)
	... 9 more
Caused by: java.lang.RuntimeException: Error in configuring object
	at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:109)
	at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:75)
	at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:133)
	at org.apache.hadoop.mapred.MapRunner.configure(MapRunner.java:38)
	... 14 more
Caused by: java.lang.reflect.InvocationTargetException
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:106)
	... 17 more
Caused by: java.lang.RuntimeException: Map operator initialization failed
	at org.apache.hadoop.hive.ql.exec.mr.ExecMapper.configure(ExecMapper.java:147)
	... 22 more
Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: java.lang.ClassNotFoundException: Class org.apache.hive.hcatalog.data.JsonSerDe not found
	at org.apache.hadoop.hive.ql.exec.MapOperator.getConvertedOI(MapOperator.java:323)
	at org.apache.hadoop.hive.ql.exec.MapOperator.setChildren(MapOperator.java:333)
	at org.apache.hadoop.hive.ql.exec.mr.ExecMapper.configure(ExecMapper.java:116)
	... 22 more
Caused by: java.lang.ClassNotFoundException: Class org.apache.hive.hcatalog.data.JsonSerDe not found
	at org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:2255)
	at org.apache.hadoop.hive.ql.plan.PartitionDesc.getDeserializer(PartitionDesc.java:137)
	at org.apache.hadoop.hive.ql.exec.MapOperator.getConvertedOI(MapOperator.java:297)
	... 24 more

原因是我用了json做数据的解析，然后在hive和yarn的lib包下没有hive-hcatalog-core-1.1.0-cdh5.16.1.jar这个jar包，于是去/opt/cloudera/parcels/CDH-5.16.1-1.cdh5.16.1.p0.3/jars下找到这个jar包把他复制到hive、yarn以及MapReduce下的lib里。再次执行问题就解决了。