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From Vikram Singh Chandel <vikramsinghchan...@gmail.com>
Subject Getting Class not Found Exception while attaching CoProcessor jar( in HDFS) to table
Date Tue, 30 Sep 2014 11:52:39 GMT
Hi

*HBase : 0.98.1 CDH 5.1.1*

When i am trying to attach CoPro jar to table in RS logs i am getting
following Exceptions

ERROR org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost:* Failed
to load coprocessor *
org.apache.hadoop.hbase.coprocessor.RowCountEndpointCoPro
java.io.IOException: *Cannot load external coprocessor class *
org.apache.hadoop.hbase.coprocessor.RowCountEndpointCoPro
        at
org.apache.hadoop.hbase.coprocessor.CoprocessorHost.load(CoprocessorHost.java:208)
        at
org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost.loadTableCoprocessors(RegionCoprocessorHost.java:207)
        at
org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost.<init>(RegionCoprocessorHost.java:163)
        at
org.apache.hadoop.hbase.regionserver.HRegion.<init>(HRegion.java:623)
        at
org.apache.hadoop.hbase.regionserver.HRegion.<init>(HRegion.java:530)
        at sun.reflect.GeneratedConstructorAccessor15.newInstance(Unknown
Source)
        at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
        at
org.apache.hadoop.hbase.regionserver.HRegion.newHRegion(HRegion.java:4137)
        at
org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:4448)
        at
org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:4421)
        at
org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:4377)
        at
org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:4328)
        at
org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler.openRegion(OpenRegionHandler.java:465)
        at
org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler.process(OpenRegionHandler.java:139)
        at
org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:128)
        at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:745)
Caused by: *java.lang.ClassNotFoundException:
org.apache.hadoop.hbase.coprocessor.RowCountEndpointCoPro*
        at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
        at
org.apache.hadoop.hbase.util.CoprocessorClassLoader.loadClass(CoprocessorClassLoader.java:275)
        at
org.apache.hadoop.hbase.coprocessor.CoprocessorHost.load(CoprocessorHost.java:206)

*command used to load the jar*

alter'vsc_sample',METHOD=>'table_att','coprocessor'=>'hdfs://InCites-head.amers1b.ciscloud:8020/user/cloud/ICDS/CoPro/lib/RowCountCoPro0.004.jar|org.apache.hadoop.hbase.coprocessor.RowCountEndpointCoPro|1001'




-- 
*Regards*

*VIKRAM SINGH CHANDEL*

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