Michiel Vanderlee created HADOOP-12914:
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Summary: RPC client should deal with the IP address change
Key: HADOOP-12914
URL: https://issues.apache.org/jira/browse/HADOOP-12914
Project: Hadoop Common
Issue Type: Bug
Components: ipc
Affects Versions: 2.7.2
Environment: CentOS 7
Reporter: Michiel Vanderlee
I'm seeing HADOOP-7472 again for the datanode in v2.7.2.
If I start the datanode before the dns entry the namenode resolve, it never
retries to resolve and keeps failing with a UnknownHostException.
A restart or the datanode fixes this.
TRACE ipc.ProtobufRpcEngine: 31: Exception <-
nn1.hdfs-namenode-rpc.service.consul:8020: versionRequest
{java.net.UnknownHostException: Invalid host name: local host is: (unknown);
destination host is: "nn1.hdfs-namenode-rpc.service.consul":8020;
java.net.UnknownHostException; For more details see:
http://wiki.apache.org/hadoop/UnknownHost}
The error comes from:
org.apache.hadoop.ipc.Client..java$Connection line: 409
public Connection(ConnectionId remoteId, int serviceClass) throws IOException {
this.remoteId = remoteId;
this.server = remoteId.getAddress();
if (server.isUnresolved()) {
throw NetUtils.wrapException(server.getHostName(),
server.getPort(),
null,
0,
new UnknownHostException());
}
The remoteId.address (InetSocketAddress) seems to only resolves on creation,
never again unless done manually.
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