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https://issues.apache.org/jira/browse/HBASE-6873?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13462320#comment-13462320
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Andrew Purtell commented on HBASE-6873:
---------------------------------------
I put up https://reviews.apache.org/r/7242/
> Clean up Coprocessor loading failure handling
> ---------------------------------------------
>
> Key: HBASE-6873
> URL: https://issues.apache.org/jira/browse/HBASE-6873
> Project: HBase
> Issue Type: Bug
> Components: Coprocessors, regionserver
> Affects Versions: 0.94.1
> Reporter: David Arthur
> Assignee: Andrew Purtell
>
> When registering a coprocessor with a missing dependency, the regionserver
> gets stuck in an infinite fail loop. Restarting the regionserver and/or
> master has no affect.
> E.g.,
> Load coprocessor from my-coproc.jar, that uses an external dependency (kafka)
> that is not included with HBase.
> {code}
> 12/09/24 13:13:15 INFO handler.OpenRegionHandler: Opening of region {NAME =>
> 'documents,,1348505987177.6d1e1b7bb93486f096173bd401e8ef6b.', STARTKEY => '',
> ENDKEY => '', ENCODED => 6d1e1b7bb93486f096173bd401e8ef6b,} failed, marking
> as FAILED_OPEN in ZK
> 12/09/24 13:13:15 DEBUG zookeeper.ZKAssign:
> regionserver:60020-0x139f43af2a70043 Attempting to transition node
> 6d1e1b7bb93486f096173bd401e8ef6b from RS_ZK_REGION_OPENING to
> RS_ZK_REGION_FAILED_OPEN
> 12/09/24 13:13:15 DEBUG zookeeper.ZKAssign:
> regionserver:60020-0x139f43af2a70043 Successfully transitioned node
> 6d1e1b7bb93486f096173bd401e8ef6b from RS_ZK_REGION_OPENING to
> RS_ZK_REGION_FAILED_OPEN
> 12/09/24 13:13:15 INFO regionserver.HRegionServer: Received request to open
> region: documents,,1348505987177.6d1e1b7bb93486f096173bd401e8ef6b.
> 12/09/24 13:13:15 DEBUG zookeeper.ZKAssign:
> regionserver:60020-0x139f43af2a70043 Attempting to transition node
> 6d1e1b7bb93486f096173bd401e8ef6b from M_ZK_REGION_OFFLINE to
> RS_ZK_REGION_OPENING
> 12/09/24 13:13:15 DEBUG zookeeper.ZKAssign:
> regionserver:60020-0x139f43af2a70043 Successfully transitioned node
> 6d1e1b7bb93486f096173bd401e8ef6b from M_ZK_REGION_OFFLINE to
> RS_ZK_REGION_OPENING
> 12/09/24 13:13:15 DEBUG regionserver.HRegion: Opening region: {NAME =>
> 'documents,,1348505987177.6d1e1b7bb93486f096173bd401e8ef6b.', STARTKEY => '',
> ENDKEY => '', ENCODED => 6d1e1b7bb93486f096173bd401e8ef6b,}
> 12/09/24 13:13:15 INFO regionserver.HRegion: Setting up tabledescriptor
> config now ...
> 12/09/24 13:13:15 INFO coprocessor.CoprocessorHost: Class
> com.mycompany.hbase.documents.DocumentObserverCoprocessor needs to be loaded
> from a file - file:/path/to/my-coproc.jar.
> 12/09/24 13:13:16 ERROR handler.OpenRegionHandler: Failed open of
> region=documents,,1348505987177.6d1e1b7bb93486f096173bd401e8ef6b., starting
> to roll back the global memstore size.
> java.lang.IllegalStateException: Could not instantiate a region instance.
> at
> org.apache.hadoop.hbase.regionserver.HRegion.newHRegion(HRegion.java:3595)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:3733)
> at
> org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler.openRegion(OpenRegionHandler.java:332)
> at
> org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler.process(OpenRegionHandler.java:108)
> at
> org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:169)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:680)
> Caused by: java.lang.reflect.InvocationTargetException
> at sun.reflect.GeneratedConstructorAccessor15.newInstance(Unknown
> Source)
> at
> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
> at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.newHRegion(HRegion.java:3592)
> ... 7 more
> Caused by: java.lang.NoClassDefFoundError:
> kafka/common/NoBrokersForPartitionException
> at java.lang.Class.getDeclaredConstructors0(Native Method)
> at java.lang.Class.privateGetDeclaredConstructors(Class.java:2389)
> at java.lang.Class.getConstructor0(Class.java:2699)
> at java.lang.Class.newInstance0(Class.java:326)
> at java.lang.Class.newInstance(Class.java:308)
> at
> org.apache.hadoop.hbase.coprocessor.CoprocessorHost.loadInstance(CoprocessorHost.java:254)
> at
> org.apache.hadoop.hbase.coprocessor.CoprocessorHost.load(CoprocessorHost.java:227)
> at
> org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost.loadTableCoprocessors(RegionCoprocessorHost.java:162)
> at
> org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost.<init>(RegionCoprocessorHost.java:126)
> at org.apache.hadoop.hbase.regionserver.HRegion.<init>(HRegion.java:417)
> ... 11 more
> Caused by: java.lang.ClassNotFoundException:
> kafka.common.NoBrokersForPartitionException
> at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
> at java.security.AccessController.doPrivileged(Native Method)
> at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
> ... 21 more
> 12/09/24 13:13:16 INFO handler.OpenRegionHandler: Opening of region {NAME =>
> 'documents,,1348505987177.6d1e1b7bb93486f096173bd401e8ef6b.', STARTKEY => '',
> ENDKEY => '', ENCODED => 6d1e1b7bb93486f096173bd401e8ef6b,} failed, marking
> as FAILED_OPEN in ZK
> 12/09/24 13:13:16 DEBUG zookeeper.ZKAssign:
> regionserver:60020-0x139f43af2a70043 Attempting to transition node
> 6d1e1b7bb93486f096173bd401e8ef6b from RS_ZK_REGION_OPENING to
> RS_ZK_REGION_FAILED_OPEN
> 12/09/24 13:13:16 DEBUG zookeeper.ZKAssign:
> regionserver:60020-0x139f43af2a70043 Successfully transitioned node
> 6d1e1b7bb93486f096173bd401e8ef6b from RS_ZK_REGION_OPENING to
> RS_ZK_REGION_FAILED_OPEN
> 12/09/24 13:13:16 INFO regionserver.HRegionServer: Received request to open
> region: documents,,1348505987177.6d1e1b7bb93486f096173bd401e8ef6b.
> 12/09/24 13:13:16 DEBUG zookeeper.ZKAssign:
> regionserver:60020-0x139f43af2a70043 Attempting to transition node
> 6d1e1b7bb93486f096173bd401e8ef6b from M_ZK_REGION_OFFLINE to
> RS_ZK_REGION_OPENING
> 12/09/24 13:13:16 DEBUG zookeeper.ZKAssign:
> regionserver:60020-0x139f43af2a70043 Successfully transitioned node
> 6d1e1b7bb93486f096173bd401e8ef6b from M_ZK_REGION_OFFLINE to
> RS_ZK_REGION_OPENING
> 12/09/24 13:13:16 DEBUG regionserver.HRegion: Opening region: {NAME =>
> 'documents,,1348505987177.6d1e1b7bb93486f096173bd401e8ef6b.', STARTKEY => '',
> ENDKEY => '', ENCODED => 6d1e1b7bb93486f096173bd401e8ef6b,}
> 12/09/24 13:13:16 INFO regionserver.HRegion: Setting up tabledescriptor
> config now ...
> 12/09/24 13:13:16 INFO coprocessor.CoprocessorHost: Class
> com.mycompany.hbase.documents.DocumentObserverCoprocessor needs to be loaded
> from a file - file:/path/to/my-coproc.jar.
> 12/09/24 13:13:17 ERROR handler.OpenRegionHandler: Failed open of
> region=documents,,1348505987177.6d1e1b7bb93486f096173bd401e8ef6b., starting
> to roll back the global memstore size.
> java.lang.IllegalStateException: Could not instantiate a region instance.
> at
> org.apache.hadoop.hbase.regionserver.HRegion.newHRegion(HRegion.java:3595)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:3733)
> at
> org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler.openRegion(OpenRegionHandler.java:332)
> at
> org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler.process(OpenRegionHandler.java:108)
> at
> org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:169)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:680)
> Caused by: java.lang.reflect.InvocationTargetException
> at sun.reflect.GeneratedConstructorAccessor15.newInstance(Unknown
> Source)
> at
> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
> at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.newHRegion(HRegion.java:3592)
> ... 7 more
> Caused by: java.lang.NoClassDefFoundError:
> kafka/common/NoBrokersForPartitionException
> at java.lang.Class.getDeclaredConstructors0(Native Method)
> at java.lang.Class.privateGetDeclaredConstructors(Class.java:2389)
> at java.lang.Class.getConstructor0(Class.java:2699)
> at java.lang.Class.newInstance0(Class.java:326)
> at java.lang.Class.newInstance(Class.java:308)
> at
> org.apache.hadoop.hbase.coprocessor.CoprocessorHost.loadInstance(CoprocessorHost.java:254)
> at
> org.apache.hadoop.hbase.coprocessor.CoprocessorHost.load(CoprocessorHost.java:227)
> at
> org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost.loadTableCoprocessors(RegionCoprocessorHost.java:162)
> at
> org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost.<init>(RegionCoprocessorHost.java:126)
> at org.apache.hadoop.hbase.regionserver.HRegion.<init>(HRegion.java:417)
> ... 11 more
> Caused by: java.lang.ClassNotFoundException:
> kafka.common.NoBrokersForPartitionException
> at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
> at java.security.AccessController.doPrivileged(Native Method)
> at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
> ... 21 more
> {code}
> Ad infinitum.
> It seems that upon failing to open a region after adding a coprocessor, that
> coprocessor should be unregister or at least disabled/blacklisted.
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