Sean Chow created HDFS-15390:
--------------------------------
Summary: client fails forever when namenode ipaddr changed
Key: HDFS-15390
URL: https://issues.apache.org/jira/browse/HDFS-15390
Project: Hadoop HDFS
Issue Type: Bug
Components: dfsclient
Affects Versions: 3.2.1, 2.9.2, 2.10.0
Reporter: Sean Chow
For machine replacement, I replace my standby namenode with a new ipaddr and
keep the same hostname. Also update the client's hosts to make it resolve
correctly
When I try to run failover to transite the new namenode(let's say nn2), the
client will fail to read or write forever until it's restarted.
That make yarn nodemanager in sick state. Even the new tasks will encounter
this exception too. Until all nodemanager restart.
{code:java}
20/06/02 15:12:25 WARN ipc.Client: Address change detected. Old:
nn2-192-168-1-100/192.168.1.100:9000 New: nn2-192-168-1-100/192.168.1.200:9000
20/06/02 15:12:25 DEBUG ipc.Client: closing ipc connection to
nn2-192-168-1-100/192.168.1.200:9000: Connection refused
java.net.ConnectException: Connection refused
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
at
sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
at
org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:206)
at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:530)
at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:494)
at
org.apache.hadoop.ipc.Client$Connection.setupConnection(Client.java:608)
at
org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:707)
at org.apache.hadoop.ipc.Client$Connection.access$2800(Client.java:368)
at org.apache.hadoop.ipc.Client.getConnection(Client.java:1517)
at org.apache.hadoop.ipc.Client.call(Client.java:1440)
at org.apache.hadoop.ipc.Client.call(Client.java:1401)
at
org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:232)
at com.sun.proxy.$Proxy9.addBlock(Unknown Source)
at
org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.addBlock(ClientNamenodeProtocolTranslatorPB.java:399)
at sun.reflect.GeneratedMethodAccessor8.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at
org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:193)
at
org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:102)
{code}
We can see the client has Address change detected, but it still fails. I find
out that's because when method updateAddress() return ture, the
handleConnectionFailure() thow an exception that break the next retry with the
right ipaddr.
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