public void copyInitialState(Path origAppDir) throws IOException {
// locate previous snapshot
String newAppDir = this.dag.assertAppPath();
FSRecoveryHandler recoveryHandler = new FSRecoveryHandler(origAppDir.toString(), conf);
// read snapshot against new dependencies
Object snapshot = recoveryHandler.restore();
if (snapshot == null) {
throw new IllegalArgumentException("No previous application state found in " + origAppDir);
}
InputStream logIs = recoveryHandler.getLog();
// modify snapshot state to switch app id
((StreamingContainerManager.CheckpointState) snapshot).setApplicationId(this.dag, conf);
Path checkpointPath = new Path(newAppDir, LogicalPlan.SUBDIR_CHECKPOINTS);
FileSystem fs = FileSystem.newInstance(origAppDir.toUri(), conf);
// remove the path that was created by the storage agent during deserialization and replacement
fs.delete(checkpointPath, true);
// write snapshot to new location
recoveryHandler = new FSRecoveryHandler(newAppDir, conf);
recoveryHandler.save(snapshot);
OutputStream logOs = recoveryHandler.rotateLog();
IOUtils.copy(logIs, logOs);
logOs.flush();
logOs.close();
logIs.close();
// copy sub directories that are not present in target
FileStatus[] lFiles = fs.listStatus(origAppDir);
for (FileStatus f : lFiles) {
if (f.isDirectory()) {
String targetPath = f.getPath().toString().replace(origAppDir.toString(), newAppDir);
if (!fs.exists(new Path(targetPath))) {
LOG.debug("Copying {} to {}", f.getPath(), targetPath);
FileUtil.copy(fs, f.getPath(), fs, new Path(targetPath), false, conf);
// FSUtil.copy(fs, f, fs, new Path(targetPath), false, false, conf);
} else {
LOG.debug("Ignoring {} as it already exists under {}", f.getPath(), targetPath);
// FSUtil.setPermission(fs, new Path(targetPath), new FsPermission((short)0777));
}
}
}
}
@Test
public void testRpcFailover() throws Exception {
String appPath = testMeta.dir;
Configuration conf = new Configuration(false);
final AtomicBoolean timedout = new AtomicBoolean();
StreamingContainerUmbilicalProtocol impl =
MockitoUtil.mockProtocol(StreamingContainerUmbilicalProtocol.class);
Mockito.doAnswer(
new org.mockito.stubbing.Answer<Void>() {
@Override
public Void answer(InvocationOnMock invocation) {
LOG.debug("got call: " + invocation.getMethod());
if (!timedout.get()) {
try {
timedout.set(true);
Thread.sleep(1000);
} catch (Exception e) {
}
// throw new RuntimeException("fail");
}
return null;
}
})
.when(impl)
.log("containerId", "timeout");
Server server =
new RPC.Builder(conf)
.setProtocol(StreamingContainerUmbilicalProtocol.class)
.setInstance(impl)
.setBindAddress("0.0.0.0")
.setPort(0)
.setNumHandlers(1)
.setVerbose(false)
.build();
server.start();
InetSocketAddress address = NetUtils.getConnectAddress(server);
LOG.info("Mock server listening at " + address);
int rpcTimeoutMillis = 500;
int retryDelayMillis = 100;
int retryTimeoutMillis = 500;
FSRecoveryHandler recoveryHandler = new FSRecoveryHandler(appPath, conf);
URI uri =
RecoverableRpcProxy.toConnectURI(
address, rpcTimeoutMillis, retryDelayMillis, retryTimeoutMillis);
recoveryHandler.writeConnectUri(uri.toString());
RecoverableRpcProxy rp = new RecoverableRpcProxy(appPath, conf);
StreamingContainerUmbilicalProtocol protocolProxy = rp.getProxy();
protocolProxy.log("containerId", "msg");
// simulate socket read timeout
try {
protocolProxy.log("containerId", "timeout");
Assert.fail("expected socket timeout");
} catch (java.net.SocketTimeoutException e) {
// expected
}
Assert.assertTrue("timedout", timedout.get());
rp.close();
// test success on retry
timedout.set(false);
retryTimeoutMillis = 1500;
uri =
RecoverableRpcProxy.toConnectURI(
address, rpcTimeoutMillis, retryDelayMillis, retryTimeoutMillis);
recoveryHandler.writeConnectUri(uri.toString());
protocolProxy.log("containerId", "timeout");
Assert.assertTrue("timedout", timedout.get());
rp.close();
server.stop();
}
/**
* Test serialization of the container manager with mock execution layer.
*
* @throws Exception
*/
private void testContainerManager(StorageAgent agent) throws Exception {
FileUtils.deleteDirectory(new File(testMeta.dir)); // clean any state from previous run
LogicalPlan dag = new LogicalPlan();
dag.setAttribute(LogicalPlan.APPLICATION_PATH, testMeta.dir);
dag.setAttribute(OperatorContext.STORAGE_AGENT, agent);
StatsListeningOperator o1 = dag.addOperator("o1", StatsListeningOperator.class);
FSRecoveryHandler recoveryHandler =
new FSRecoveryHandler(dag.assertAppPath(), new Configuration(false));
StreamingContainerManager scm =
StreamingContainerManager.getInstance(recoveryHandler, dag, false);
File expFile = new File(recoveryHandler.getDir(), FSRecoveryHandler.FILE_SNAPSHOT);
Assert.assertTrue("snapshot file " + expFile, expFile.exists());
PhysicalPlan plan = scm.getPhysicalPlan();
assertEquals("number required containers", 1, plan.getContainers().size());
PTOperator o1p1 = plan.getOperators(dag.getMeta(o1)).get(0);
@SuppressWarnings(
"UnusedAssignment") /* sneaky: the constructor does some changes to the container */
MockContainer mc = new MockContainer(scm, o1p1.getContainer());
PTContainer originalContainer = o1p1.getContainer();
Assert.assertNotNull(o1p1.getContainer().bufferServerAddress);
assertEquals(PTContainer.State.ACTIVE, o1p1.getContainer().getState());
assertEquals("state " + o1p1, PTOperator.State.PENDING_DEPLOY, o1p1.getState());
// test restore initial snapshot + log
dag = new LogicalPlan();
dag.setAttribute(LogicalPlan.APPLICATION_PATH, testMeta.dir);
scm =
StreamingContainerManager.getInstance(
new FSRecoveryHandler(dag.assertAppPath(), new Configuration(false)), dag, false);
dag = scm.getLogicalPlan();
plan = scm.getPhysicalPlan();
o1p1 = plan.getOperators(dag.getOperatorMeta("o1")).get(0);
assertEquals("post restore state " + o1p1, PTOperator.State.PENDING_DEPLOY, o1p1.getState());
o1 = (StatsListeningOperator) o1p1.getOperatorMeta().getOperator();
assertEquals(
"containerId", originalContainer.getExternalId(), o1p1.getContainer().getExternalId());
assertEquals("stats listener", 1, o1p1.statsListeners.size());
assertEquals("number stats calls", 0, o1.processStatsCnt); // stats are not logged
assertEquals("post restore 1", PTContainer.State.ALLOCATED, o1p1.getContainer().getState());
assertEquals(
"post restore 1",
originalContainer.bufferServerAddress,
o1p1.getContainer().bufferServerAddress);
StreamingContainerAgent sca = scm.getContainerAgent(originalContainer.getExternalId());
Assert.assertNotNull("allocated container restored " + originalContainer, sca);
assertEquals(
"memory usage allocated container",
(int) OperatorContext.MEMORY_MB.defaultValue,
sca.container.getAllocatedMemoryMB());
// YARN-1490 - simulate container terminated on AM recovery
scm.scheduleContainerRestart(originalContainer.getExternalId());
assertEquals("memory usage of failed container", 0, sca.container.getAllocatedMemoryMB());
Checkpoint firstCheckpoint = new Checkpoint(3, 0, 0);
mc = new MockContainer(scm, o1p1.getContainer());
checkpoint(scm, o1p1, firstCheckpoint);
mc.stats(o1p1.getId())
.deployState(OperatorHeartbeat.DeployState.ACTIVE)
.currentWindowId(3)
.checkpointWindowId(3);
mc.sendHeartbeat();
assertEquals("state " + o1p1, PTOperator.State.ACTIVE, o1p1.getState());
// logical plan modification triggers snapshot
CreateOperatorRequest cor = new CreateOperatorRequest();
cor.setOperatorFQCN(GenericTestOperator.class.getName());
cor.setOperatorName("o2");
CreateStreamRequest csr = new CreateStreamRequest();
csr.setSourceOperatorName("o1");
csr.setSourceOperatorPortName("outport");
csr.setSinkOperatorName("o2");
csr.setSinkOperatorPortName("inport1");
FutureTask<?> lpmf = scm.logicalPlanModification(Lists.newArrayList(cor, csr));
while (!lpmf.isDone()) {
scm.monitorHeartbeat();
}
Assert.assertNull(lpmf.get()); // unmask exception, if any
Assert.assertSame("dag references", dag, scm.getLogicalPlan());
assertEquals("number operators after plan modification", 2, dag.getAllOperators().size());
// set operator state triggers journal write
o1p1.setState(PTOperator.State.INACTIVE);
Checkpoint offlineCheckpoint = new Checkpoint(10, 0, 0);
// write checkpoint while AM is out,
// it needs to be picked up as part of restore
checkpoint(scm, o1p1, offlineCheckpoint);
// test restore
dag = new LogicalPlan();
dag.setAttribute(LogicalPlan.APPLICATION_PATH, testMeta.dir);
scm =
StreamingContainerManager.getInstance(
new FSRecoveryHandler(dag.assertAppPath(), new Configuration(false)), dag, false);
Assert.assertNotSame("dag references", dag, scm.getLogicalPlan());
assertEquals(
"number operators after restore", 2, scm.getLogicalPlan().getAllOperators().size());
dag = scm.getLogicalPlan();
plan = scm.getPhysicalPlan();
o1p1 = plan.getOperators(dag.getOperatorMeta("o1")).get(0);
assertEquals("post restore state " + o1p1, PTOperator.State.INACTIVE, o1p1.getState());
o1 = (StatsListeningOperator) o1p1.getOperatorMeta().getOperator();
assertEquals("stats listener", 1, o1p1.statsListeners.size());
assertEquals("number stats calls post restore", 1, o1.processStatsCnt);
assertEquals("post restore 1", PTContainer.State.ACTIVE, o1p1.getContainer().getState());
assertEquals(
"post restore 1",
originalContainer.bufferServerAddress,
o1p1.getContainer().bufferServerAddress);
// offline checkpoint detection
assertEquals(
"checkpoints after recovery",
Lists.newArrayList(firstCheckpoint, offlineCheckpoint),
o1p1.checkpoints);
}