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MAPREDUCE-6240. Hadoop client displays confusing error message. (gera)

This commit is contained in:
Gera Shegalov 2016-05-28 22:01:07 -07:00
parent 1ee9ea0026
commit 0af96a1c08
2 changed files with 32 additions and 9 deletions
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15
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/Cluster.java
View File

@ -102,6 +102,10 @@ public class Cluster {
throws IOException {
initProviderList();
final IOException initEx = new IOException(
"Cannot initialize Cluster. Please check your configuration for "
+ MRConfig.FRAMEWORK_NAME
+ " and the correspond server addresses.");
for (ClientProtocolProvider provider : providerList) {
LOG.debug("Trying ClientProtocolProvider : "
+ provider.getClass().getName());
@ -124,16 +128,15 @@ public class Cluster {
+ " as the ClientProtocolProvider - returned null protocol");
}
} catch (Exception e) {
LOG.info("Failed to use " + provider.getClass().getName()
+ " due to error: ", e);
final String errMsg = "Failed to use " + provider.getClass().getName()
+ " due to error: ";
initEx.addSuppressed(new IOException(errMsg, e));
LOG.info(errMsg, e);
}
}
if (null == clientProtocolProvider || null == client) {
throw new IOException(
"Cannot initialize Cluster. Please check your configuration for "
+ MRConfig.FRAMEWORK_NAME
+ " and the correspond server addresses.");
throw initEx;
}
}

26
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapreduce/TestClientProtocolProviderImpls.java
View File

@ -18,17 +18,20 @@
package org.apache.hadoop.mapreduce;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import java.io.IOException;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.UnsupportedFileSystemException;
import org.apache.hadoop.mapred.LocalJobRunner;
import org.apache.hadoop.mapred.YARNRunner;
import org.apache.hadoop.mapreduce.server.jobtracker.JTConfig;
import org.apache.hadoop.util.StringUtils;
import org.junit.Test;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
public class TestClientProtocolProviderImpls {
@Test
@ -76,4 +79,21 @@ public class TestClientProtocolProviderImpls {
"Cannot initialize Cluster. Please check"));
}
}
@Test
public void testClusterExceptionRootCause() throws Exception {
final Configuration conf = new Configuration();
conf.set(MRConfig.FRAMEWORK_NAME, MRConfig.YARN_FRAMEWORK_NAME);
conf.set(FileSystem.FS_DEFAULT_NAME_KEY, "nosuchfs:///");
conf.set(JTConfig.JT_IPC_ADDRESS, "local");
try {
new Cluster(conf);
fail("Cluster init should fail because of non-existing FileSystem");
} catch (IOException ioEx) {
final String stackTrace = StringUtils.stringifyException(ioEx);
assertTrue("No root cause detected",
stackTrace.contains(UnsupportedFileSystemException.class.getName())
&& stackTrace.contains("nosuchfs"));
}
}
}