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https://issues.apache.org/jira/browse/YARN-8844?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16638596#comment-16638596
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Eric Yang commented on YARN-8844:
---------------------------------
The test is design to pass, when Socket exception is thrown.
{code}
150 @Test(timeout = 20000)
151 public void testNMProxyRPCRetry() throws Exception {
152 conf.setLong(YarnConfiguration.CLIENT_NM_CONNECT_MAX_WAIT_MS, 1000);
153 conf.setLong(YarnConfiguration.CLIENT_NM_CONNECT_RETRY_INTERVAL_MS,
100);
154 StartContainersRequest allRequests =
155 Records.newRecord(StartContainersRequest.class);
156 Configuration newConf = new YarnConfiguration(conf);
157 newConf.setInt(
158
CommonConfigurationKeysPublic.IPC_CLIENT_CONNECT_MAX_RETRIES_KEY, 100);
159
160 newConf.setInt(CommonConfigurationKeysPublic.
161 IPC_CLIENT_CONNECT_MAX_RETRIES_ON_SOCKET_TIMEOUTS_KEY, 100);
162 // connect to some dummy address so that it can trigger
163 // connection failure and RPC level retires.
164 newConf.set(YarnConfiguration.NM_ADDRESS, "1234");
165 ContainerManagementProtocol proxy = getNMProxy(newConf);
166 try {
167 proxy.startContainers(allRequests);
168 Assert.fail("should get socket exception");
169 } catch (IOException e) {
170 // socket exception should be thrown immediately, without RPC
retries.
171 Assert.assertTrue(e instanceof java.net.SocketException);
172 }
173 }
{code}
This test passes with Java 1.8.0_151, but it fails with Java 1.8.0_181. In
Java 1.8.0_181, exception throw was java.net.UnknownHostException instead of
SocketException. YARN configuration for the test case is to setup
NM_ADDRESS=1234 without a hostname. This cause the test case to fail. The
solution is to change NM_ADDRESS to 0.0.0.0:1234 to get SocketException instead
of UnknownHostException.
> TestNMProxy unit test is failing
> --------------------------------
>
> Key: YARN-8844
> URL: https://issues.apache.org/jira/browse/YARN-8844
> Project: Hadoop YARN
> Issue Type: Bug
> Components: yarn
> Affects Versions: 3.3.0
> Reporter: Eric Yang
> Priority: Major
>
> TestNMProxy has been failing in trunk for the last two or three weeks.
> Investigating the failure.
> {code}
> [INFO] Running
> org.apache.hadoop.yarn.server.nodemanager.containermanager.TestNMProxy
> [ERROR] Tests run: 3, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 4.806
> s <<< FAILURE! - in
> org.apache.hadoop.yarn.server.nodemanager.containermanager.TestNMProxy
> [ERROR]
> testNMProxyRPCRetry(org.apache.hadoop.yarn.server.nodemanager.containermanager.TestNMProxy)
> Time elapsed: 1.188 s <<< FAILURE!
> java.lang.AssertionError
> at org.junit.Assert.fail(Assert.java:86)
> at org.junit.Assert.assertTrue(Assert.java:41)
> at org.junit.Assert.assertTrue(Assert.java:52)
> at
> org.apache.hadoop.yarn.server.nodemanager.containermanager.TestNMProxy.testNMProxyRPCRetry(TestNMProxy.java:171)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at
> org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
> at
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
> at
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
> at
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
> at
> org.junit.internal.runners.statements.FailOnTimeout$StatementThread.run(FailOnTimeout.java:74)
> {code}
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