kylin问题总结

一、点击加载hive表出现如下异常：

java.lang.NoClassDefFoundError: org/apache/hadoop/hive/cli/CliSessionState

java.lang.NoClassDefFoundError: org/apache/hadoop/hive/ql/session/SessionState

解决：将hive lib文件夹下的lib拷贝到kylin lib文件夹下。

查看了下bin里的find-hive-dependency.sh，有设置hive_dependency 包含了所有hive lib下的jar包，但不知道为啥没起作用。所以只好拷贝操作了

在网上看到一个人说，修改bin目录下的kylin.sh

在HBASE_CLASSPATH_PREFIX把hive_dependency 加上。经测可用。

二、解决jar问题，hive表依然加载不出来（点击加载树，一直在转圈）

查看log，如：tail -f -n200 /opt/app/apache-kylin-2.0.0-bin/logs/kylin.log

发现没有异常，弄得我直挠头。尝试点了下reload table按钮，终于报出了异常，但是后台log依然没打出来，报出异常提示连接不上元数据。

hive不知道什么时候挂了，输入： hive --service metastore & 启动一下元数据。终于看到加载的hive表了

为了配置kylin，/etc/profile文件加入如下：

export JAVA_HOME=/opt/app/jdk1.8.0_131
PATH=$PATH:/$JAVA_HOME/bin
CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
JRE_HOME=$JAVA_HOME/jre
export HADOOP_HOME=/opt/app/hadoop-2.8.0
PATH=$PATH:$HADOOP_HOME/bin:$PATH
export HIVE_HOME=/opt/app/apache-hive-2.1.1-bin
export HCAT_HOME=$HIVE_HOME/hcatalog
export HIVE_CONF=$HIVE_HOME/conf
PATH=$PATH:$HIVE_HOME/bin:$PATH
export HBASE_HOME=/opt/app/hbase-1.3.1
PATH=$PATH:$HBASE_HOME/bin:$PATH
#export HIVE_CONF=/opt/app/apache-hive-2.1.1-bin/conf
#PATH=$PATH:$HIVE_HOME/bin:$PATH
export KYLIN_HOME=/opt/app/apache-kylin-2.0.0-bin
PATH=$PATH:$KYLIN_HOME/bin:$PATH
#export KYLIN_HOME=/opt/app/kylin/
# zookeeper env 本人zookeeper用了hbase自带的，此没有用到
export ZOOKEEPER_HOME=/opt/app/zookeeper-3.4.6
export PATH=$ZOOKEEPER_HOME/bin:$PATH

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问题：将hadoop format，重新搭建环境，报异常： org.apache.hadoop.hbase.TableExistsException: kylin_metadata_user

解决：

1.如果是独立的zookeeper

在zookeeper的bin目录下有一个zkCli.sh ,运行进入；
进入后运行 rmr  /hbase , 然后quit退出；

2.如果是用hbase自带的zookeeper

用 hbase zkcli进入

进入后运行 rmr  /hbase , 然后quit退出；

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问题：File does not exist: hdfs://localhost:9000/home/hadoop/data/mapred/staging/root1629090427/.staging/job_local1629090427_0006/libjars/hive-metastore-1.2.1.jar

是由于mapred-site.xml、yarn没有配置正确造成的。

mapred-site.xml

    mapreduce.reduce.java.opts
    -Xms2000m -Xmx4600m


    mapreduce.map.memory.mb
    5120


    mapreduce.reduce.input.buffer.percent
    0.5

 
   mapreduce.reduce.memory.mb
   2048
 

    mapred.tasktracker.reduce.tasks.maximum
    2


    mapreduce.framework.name
    yarn


     mapreduce.jobhistory.address
     localhost:10020
  
  
     yarn.app.mapreduce.am.staging-dir
     /home/hadoop/data/mapred/staging
  
  
     mapreduce.jobhistory.intermediate-done-dir
     ${yarn.app.mapreduce.am.staging-dir}/history/done_intermediate
  
  
     mapreduce.jobhistory.done-dir
     ${yarn.app.mapreduce.am.staging-dir}/history/done
  

yarn-site.xml

    
    yarn.nodemanager.aux-services
    mapreduce_shuffle
    

    yarn.nodemanager.aux-services.mapreduce_shuffle.class
    org.apache.hadoop.mapred.ShuffleHandler

 
        mapreduce.jobtracker.staging.root.dir
        /home/hadoop/data/mapred/staging

  
   yarn.app.mapreduce.am.staging-dir
    /home/hadoop/data/mapred/staging
  
  
    yarn.resourcemanager.hostname
    localhost
  

记得启动 /hadoop-2.8.0/sbin/mr-jobhistory-daemon.sh start historyserver

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问题：build cube没有成功，得到如下log

Counters: 41
	File System Counters
		FILE: Number of bytes read=0
		FILE: Number of bytes written=310413
		FILE: Number of read operations=0
		FILE: Number of large read operations=0
		FILE: Number of write operations=0
		HDFS: Number of bytes read=1700
		HDFS: Number of bytes written=0
		HDFS: Number of read operations=4
		HDFS: Number of large read operations=0
		HDFS: Number of write operations=0
	Job Counters 
		Failed map tasks=1
		Failed reduce tasks=6
		Killed reduce tasks=3
		Launched map tasks=2
		Launched reduce tasks=9
		Other local map tasks=1
		Data-local map tasks=1
		Total time spent by all maps in occupied slots (ms)=10602
		Total time spent by all reduces in occupied slots (ms)=76818
		Total time spent by all map tasks (ms)=10602
		Total time spent by all reduce tasks (ms)=76818
		Total vcore-seconds taken by all map tasks=10602
		Total vcore-seconds taken by all reduce tasks=76818
		Total megabyte-seconds taken by all map tasks=10856448
		Total megabyte-seconds taken by all reduce tasks=78661632
	Map-Reduce Framework
		Map input records=0
		Map output records=3
		Map output bytes=42
		Map output materialized bytes=104
		Input split bytes=1570
		Combine input records=3
		Combine output records=3
		Spilled Records=3

		Failed Shuffles=0
		Merged Map outputs=0
		GC time elapsed (ms)=168
		CPU time spent (ms)=3790
		Physical memory (bytes) snapshot=356413440
		Virtual memory (bytes) snapshot=2139308032
		Total committed heap usage (bytes)=195035136
	File Input Format Counters 
		Bytes Read=0

在mapred-site.xml中加上如下配置：

 
    mapreduce.reduce.java.opts
    -Xms2000m -Xmx4600m


    mapreduce.map.memory.mb
    5120


    mapreduce.reduce.input.buffer.percent
    0.5

 
   mapreduce.reduce.memory.mb
   2048