Arpit Agarwal created HADOOP-12522:
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Summary: Simplify adding NN service RPC port to an existing HA
cluster with ZKFCs
Key: HADOOP-12522
URL: https://issues.apache.org/jira/browse/HADOOP-12522
Project: Hadoop Common
Issue Type: Bug
Components: ha
Affects Versions: 2.7.1
Reporter: Arpit Agarwal
Assignee: Arpit Agarwal
ZKFCs fail the following check in {{DFSZKFailoverController#dataToTarget}} if
an NN service RPC port is added to an existing cluster.
{code}
protected HAServiceTarget dataToTarget(byte[] data) {
...
if (!addressFromProtobuf.equals(ret.getAddress())) {
throw new RuntimeException("Mismatched address stored in ZK for " +
ret + ": Stored protobuf was " + proto + ", address from our own " +
"configuration for this NameNode was " + ret.getAddress());
}
{code}
The NN address stored in the znode had the common client+service RPC port
number whereas the configuration now returns an address with the service RPC
port. The workaround is to reformat the ZKFC state in ZK with {{hdfs zkfc
-formatZK}}.
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