Class not found exception while creating a table in HBASE

Question

After succesfull installation and configuration of HBase on top of HDFS on our local servers, I did the same configuration on our OVH VPS machines, however I am getting a strange error.

Entire setup is starting fine, however, when I try to create a table from hbase shell, I am getting following error:

2017-05-20 11:59:19,256 ERROR [RpcServer.FifoWFPBQ.default.handler=29,queue=2,port=16000] master.MasterRpcServices: Region server prdhad001,16020,1495274311971 reported a fatal error: ABORTING region server prdhad001,16020,1495274311971: The coprocessor org.apache.hadoop.hbase.client.coprocessor.AggregateImplementation threw java.lang.ClassNotFoundException: org.apache.hadoop.hbase.client.coprocessor.AggregateImplementation Cause: java.lang.ClassNotFoundException: org.apache.hadoop.hbase.client.coprocessor.AggregateImplementation at java.net.URLClassLoader.findClass(URLClassLoader.java:381)

and after that entire hbase is getting corrupted and throwing numerous errors. It seems that it doesn't load some jars properly , however jar is present inside lib folder.

My configuration :
Virtualization: kvm Operating System: CentOS Linux 7 (Core)
CPE OS Name: cpe:/o:centos:centos:7
Kernel: Linux 3.10.0-514.16.1.el7.x86_64
Architecture: x86-64 Hadoop 2.7.3 HBase 1.3.0

export PATH=$PATH:$HADOOP_HOME/bin export HADOOP_HOME=/usr/local/hadoop export PATH=$PATH:$HADOOP_HOME/bin
export PATH=$PATH:$HADOOP_HOME/sbin export HADOOP_MAPRED_HOME=$HADOOP_HOME export HADOOP_COMMON_HOME=$HADOOP_HOME export HADOOP_HDFS_HOME=$HADOOP_HOME export YARN_HOME=$HADOOP_HOME export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_HOME/lib/native export HADOOP_OPTS="-Djava.library.path=$HADOOP_HOME/lib" export HBASE_CLASSPATH=/usr/local/hbase/lib/

Dawid Adach Dawid Adach · Accepted Answer · 2017-05-20T14:47:14

I figured it out, inside the hbase-site.xml I had following property added:

<property>
    <name>hbase.coprocessor.region.classes</name>
    <value>org.apache.hadoop.hbase.coprocessor.AggregateImplementation</value>
 </property>

which is used for the coprocessor, which we don't use at the moment. Removing this part fixed the issue, however, I guess that if we would like to use coprocessor in the future we might encounter this issue again do any other help will bee appreciated.

Class not found exception while creating a table in HBASE

1 Answers