Java Code Examples for org.apache.flink.runtime.testutils.TestJvmProcess#waitForMarkerFile()

@Test
public void testProcessShutdownBlocking() throws Exception {
	// this test works only on linux
	assumeTrue(OperatingSystem.isLinux());

	final File markerFile = new File(
			EnvironmentInformation.getTemporaryFileDirectory(), UUID.randomUUID() + ".marker");

	final BlockingShutdownProcess blockingProcess = 
			new BlockingShutdownProcess(markerFile.getAbsolutePath(), 0, false);

	try {
		blockingProcess.startProcess();
		long pid = blockingProcess.getProcessId();
		assertTrue("Cannot determine process ID", pid != -1);

		// wait for the marker file to appear, which means the process is up properly
		TestJvmProcess.waitForMarkerFile(markerFile, 30000);

		// send it a regular kill command (SIG_TERM)
		Process kill = Runtime.getRuntime().exec("kill " + pid);
		kill.waitFor();
		assertEquals("failed to send SIG_TERM to process", 0, kill.exitValue());

		// minimal delay until the Java process object notices that the process is gone
		// this will not let the test fail predictably if the process is actually in fact going away,
		// but it would create frequent failures. Not ideal, but the best we can do without
		// severely prolonging the test
		Thread.sleep(50);

		// the process should not go away by itself
		assertTrue("Test broken, process shutdown blocking does not work", blockingProcess.isAlive());
	}
	finally {
		blockingProcess.destroy();

		//noinspection ResultOfMethodCallIgnored
		markerFile.delete();
	}
}
 

@Test
public void testProcessShutdownBlocking() throws Exception {
	// this test works only on linux
	assumeTrue(OperatingSystem.isLinux());

	final File markerFile = new File(
			EnvironmentInformation.getTemporaryFileDirectory(), UUID.randomUUID() + ".marker");

	final BlockingShutdownProcess blockingProcess = 
			new BlockingShutdownProcess(markerFile.getAbsolutePath(), 0, false);

	try {
		blockingProcess.startProcess();
		long pid = blockingProcess.getProcessId();
		assertTrue("Cannot determine process ID", pid != -1);

		// wait for the marker file to appear, which means the process is up properly
		TestJvmProcess.waitForMarkerFile(markerFile, 30000);

		// send it a regular kill command (SIG_TERM)
		Process kill = Runtime.getRuntime().exec("kill " + pid);
		kill.waitFor();
		assertEquals("failed to send SIG_TERM to process", 0, kill.exitValue());

		// minimal delay until the Java process object notices that the process is gone
		// this will not let the test fail predictably if the process is actually in fact going away,
		// but it would create frequent failures. Not ideal, but the best we can do without
		// severely prolonging the test
		Thread.sleep(50);

		// the process should not go away by itself
		assertTrue("Test broken, process shutdown blocking does not work", blockingProcess.isAlive());
	}
	finally {
		blockingProcess.destroy();

		//noinspection ResultOfMethodCallIgnored
		markerFile.delete();
	}
}
 

@Test
public void testProcessShutdownBlocking() throws Exception {
	// this test works only on linux
	assumeTrue(OperatingSystem.isLinux());

	final File markerFile = new File(
			EnvironmentInformation.getTemporaryFileDirectory(), UUID.randomUUID() + ".marker");

	final BlockingShutdownProcess blockingProcess = 
			new BlockingShutdownProcess(markerFile.getAbsolutePath(), 0, false);

	try {
		blockingProcess.startProcess();
		long pid = blockingProcess.getProcessId();
		assertTrue("Cannot determine process ID", pid != -1);

		// wait for the marker file to appear, which means the process is up properly
		TestJvmProcess.waitForMarkerFile(markerFile, 30000);

		// send it a regular kill command (SIG_TERM)
		Process kill = Runtime.getRuntime().exec("kill " + pid);
		kill.waitFor();
		assertEquals("failed to send SIG_TERM to process", 0, kill.exitValue());

		// minimal delay until the Java process object notices that the process is gone
		// this will not let the test fail predictably if the process is actually in fact going away,
		// but it would create frequent failures. Not ideal, but the best we can do without
		// severely prolonging the test
		Thread.sleep(50);

		// the process should not go away by itself
		assertTrue("Test broken, process shutdown blocking does not work", blockingProcess.isAlive());
	}
	finally {
		blockingProcess.destroy();

		//noinspection ResultOfMethodCallIgnored
		markerFile.delete();
	}
}
 

private void testDirectoriesCleanupOnKill(boolean callerHasHook) throws Exception {
	assumeTrue(OperatingSystem.isLinux()
			|| OperatingSystem.isFreeBSD()
			|| OperatingSystem.isSolaris()
			|| OperatingSystem.isMac());

	File fileChannelDir = temporaryFolder.newFolder();
	File signalDir = temporaryFolder.newFolder();
	File signalFile = new File(signalDir.getAbsolutePath(), SIGNAL_FILE_FOR_KILLING);

	FileChannelManagerTestProcess fileChannelManagerTestProcess = new FileChannelManagerTestProcess(
		callerHasHook,
		fileChannelDir.getAbsolutePath(),
		signalFile.getAbsolutePath());

	try {
		fileChannelManagerTestProcess.startProcess();

		// Waits till the process has created temporary files and registered the corresponding shutdown hooks.
		TestJvmProcess.waitForMarkerFile(signalFile, TEST_TIMEOUT.toMillis());

		Process kill = Runtime.getRuntime().exec("kill " + fileChannelManagerTestProcess.getProcessId());
		kill.waitFor();
		assertEquals("Failed to send SIG_TERM to process", 0, kill.exitValue());

		Deadline deadline = Deadline.now().plus(TEST_TIMEOUT);
		while (fileChannelManagerTestProcess.isAlive() && deadline.hasTimeLeft()) {
			Thread.sleep(100);
		}

		assertFalse(
			"The file channel manager test process does not terminate in time, its output is: \n" +
				fileChannelManagerTestProcess.getProcessOutput(),
			fileChannelManagerTestProcess.isAlive());

		// Checks if the directories are cleared.
		assertFalse(
			"The file channel manager test process does not remove the tmp shuffle directories after termination, " +
				"its output is \n" + fileChannelManagerTestProcess.getProcessOutput(),
			fileOrDirExists(fileChannelDir, DIR_NAME_PREFIX));
	} finally {
		fileChannelManagerTestProcess.destroy();
	}
}