Robert Kanter created YARN-6642:
-----------------------------------
Summary: TestRMFailover fails rarely due to port conflict
Key: YARN-6642
URL: https://issues.apache.org/jira/browse/YARN-6642
Project: Hadoop YARN
Issue Type: Bug
Components: test
Affects Versions: 2.9.0, 3.0.0-alpha3
Reporter: Robert Kanter
Assignee: Robert Kanter
We've seen various tests in {{TestRMFailover}} fail very rarely with a message
like "org.apache.hadoop.yarn.exceptions.YarnRuntimeException:
java.io.IOException: ResourceManager failed to start. Final state is STOPPED".
After some digging, it turns out that it's due to a port conflict with the
embedded ZooKeeper in the tests. The embedded ZooKeeper uses
{{ServerSocketUtil#getPort}} to choose a free port, but the RMs are configured
to 10000 + <default-port> and 20000 + <default-port> (e.g. the default port for
the RM is 8032, so you'd use 18032 and 28032).
When I was able to reproduce this, I saw that ZooKeeper was using port 18033,
which is 10000 + 8033, the default RM Admin port. It results in an error like
this, causing the RM to be unable to start, and hence the original error
message in the test failure:
{noformat}
2017-05-24 01:16:52,735 INFO service.AbstractService
(AbstractService.java:noteFailure(272)) - Service ResourceManager failed in
state STARTED; cause: org.apache.hadoop.yarn.exceptions.YarnRuntimeException:
java.net.BindException: Problem binding to [0.0.0.0:18033]
java.net.BindException: Address already in use; For more details see:
http://wiki.apache.org/hadoop/BindException
org.apache.hadoop.yarn.exceptions.YarnRuntimeException: java.net.BindException:
Problem binding to [0.0.0.0:18033] java.net.BindException: Address already in
use; For more details see: http://wiki.apache.org/hadoop/BindException
at
org.apache.hadoop.yarn.factories.impl.pb.RpcServerFactoryPBImpl.getServer(RpcServerFactoryPBImpl.java:139)
at
org.apache.hadoop.yarn.ipc.HadoopYarnProtoRPC.getServer(HadoopYarnProtoRPC.java:65)
at org.apache.hadoop.yarn.ipc.YarnRPC.getServer(YarnRPC.java:54)
at
org.apache.hadoop.yarn.server.resourcemanager.AdminService.startServer(AdminService.java:171)
at
org.apache.hadoop.yarn.server.resourcemanager.AdminService.serviceStart(AdminService.java:158)
at
org.apache.hadoop.service.AbstractService.start(AbstractService.java:193)
at
org.apache.hadoop.service.CompositeService.serviceStart(CompositeService.java:120)
at
org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.serviceStart(ResourceManager.java:1147)
at
org.apache.hadoop.service.AbstractService.start(AbstractService.java:193)
at
org.apache.hadoop.yarn.server.MiniYARNCluster$2.run(MiniYARNCluster.java:310)
Caused by: java.net.BindException: Problem binding to [0.0.0.0:18033]
java.net.BindException: Address already in use; For more details see:
http://wiki.apache.org/hadoop/BindException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at org.apache.hadoop.net.NetUtils.wrapWithMessage(NetUtils.java:791)
at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:720)
at org.apache.hadoop.ipc.Server.bind(Server.java:482)
at org.apache.hadoop.ipc.Server$Listener.<init>(Server.java:688)
at org.apache.hadoop.ipc.Server.<init>(Server.java:2376)
at org.apache.hadoop.ipc.RPC$Server.<init>(RPC.java:1042)
at
org.apache.hadoop.ipc.ProtobufRpcEngine$Server.<init>(ProtobufRpcEngine.java:535)
at
org.apache.hadoop.ipc.ProtobufRpcEngine.getServer(ProtobufRpcEngine.java:510)
at org.apache.hadoop.ipc.RPC$Builder.build(RPC.java:887)
at
org.apache.hadoop.yarn.factories.impl.pb.RpcServerFactoryPBImpl.createServer(RpcServerFactoryPBImpl.java:169)
at
org.apache.hadoop.yarn.factories.impl.pb.RpcServerFactoryPBImpl.getServer(RpcServerFactoryPBImpl.java:132)
... 9 more
Caused by: java.net.BindException: Address already in use
at sun.nio.ch.Net.bind0(Native Method)
at sun.nio.ch.Net.bind(Net.java:444)
at sun.nio.ch.Net.bind(Net.java:436)
at
sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:214)
at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74)
at org.apache.hadoop.ipc.Server.bind(Server.java:465)
... 17 more
2017-05-24 01:16:52,736 DEBUG service.AbstractService
(AbstractService.java:enterState(452)) - Service: ResourceManager entered state
STOPPED
{noformat}
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