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HDFS-9112. Improve error message for Haadmin when multiple name service IDs are configured. Contributed by Anu Engineer. 

(cherry picked from commit 83e99d06d0)
This commit is contained in:
Jing Zhao 2015-09-25 14:21:23 -07:00
parent bc5ee80794
commit aca014ea67
2 changed files with 16 additions and 3 deletions
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3
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -617,6 +617,9 @@ Release 2.8.0 - UNRELEASED
HDFS-5795. RemoteBlockReader2#checkSuccess() shoud print error status.
(Xiao Chen via Yongjun Zhang)
HDFS-9112. Improve error message for Haadmin when multiple name service IDs
are configured. (Anu Engineer via jing9)
OPTIMIZATIONS
HDFS-8026. Trace FSOutputSummer#writeChecksumChunks rather than

14
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/NNHAServiceTarget.java
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@ -18,6 +18,7 @@
package org.apache.hadoop.hdfs.tools;
import java.net.InetSocketAddress;
import java.util.Arrays;
import java.util.Map;
import org.apache.hadoop.classification.InterfaceAudience;
@ -34,6 +35,8 @@ import org.apache.hadoop.net.NetUtils;
import com.google.common.base.Preconditions;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMESERVICES;
/**
* One of the NN NameNodes acting as the target of an administrative command
* (e.g. failover).
@ -60,8 +63,15 @@ public class NNHAServiceTarget extends HAServiceTarget {
if (nsId == null) {
nsId = DFSUtil.getOnlyNameServiceIdOrNull(conf);
if (nsId == null) {
throw new IllegalArgumentException(
"Unable to determine the nameservice id.");
String errorString = "Unable to determine the name service ID.";
String[] dfsNames = conf.getStrings(DFS_NAMESERVICES);
if ((dfsNames != null) && (dfsNames.length > 1)) {
errorString = "Unable to determine the name service ID. " +
"This is an HA configuration with multiple name services " +
"configured. " + DFS_NAMESERVICES + " is set to " +
Arrays.toString(dfsNames) + ". Please re-run with the -ns option.";
}
throw new IllegalArgumentException(errorString);
}
}
assert nsId != null;