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HDFS-14500. NameNode StartupProgress should not allow new steps in an already-completed phase. Contributed by Erik Krogen.

This commit is contained in:
Erik Krogen 2019-05-17 12:24:51 -07:00
parent c31b7b8d52
commit 55e0c134f0
2 changed files with 63 additions and 31 deletions
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35
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/startupprogress/StartupProgress.java
View File

@ -84,13 +84,14 @@ public void beginPhase(Phase phase) {
}
/**
* Begins execution of the specified step within the specified phase.
* Begins execution of the specified step within the specified phase. This is
* a no-op if the phase is already completed.
*
* @param phase Phase to begin
* @param phase Phase within which the step should be started
* @param step Step to begin
*/
public void beginStep(Phase phase, Step step) {
if (!isComplete()) {
if (!isComplete(phase)) {
lazyInitStep(phase, step).beginTime = monotonicNow();
}
}
@ -107,13 +108,14 @@ public void endPhase(Phase phase) {
}
/**
* Ends execution of the specified step within the specified phase.
*
* @param phase Phase to end
* Ends execution of the specified step within the specified phase. This is
* a no-op if the phase is already completed.
*
* @param phase Phase within which the step should be ended
* @param step Step to end
*/
public void endStep(Phase phase, Step step) {
if (!isComplete()) {
if (!isComplete(phase)) {
lazyInitStep(phase, step).endTime = monotonicNow();
}
}
@ -149,7 +151,7 @@ public Status getStatus(Phase phase) {
* @return Counter associated with phase and step
*/
public Counter getCounter(Phase phase, Step step) {
if (!isComplete()) {
if (!isComplete(phase)) {
final StepTracking tracking = lazyInitStep(phase, step);
return new Counter() {
@Override
@ -242,12 +244,17 @@ public StartupProgressView createView() {
* @return boolean true if the entire startup process has completed
*/
private boolean isComplete() {
for (Phase phase: EnumSet.allOf(Phase.class)) {
if (getStatus(phase) != Status.COMPLETE) {
return false;
}
}
return true;
return EnumSet.allOf(Phase.class).stream().allMatch(this::isComplete);
}
/**
* Returns true if the given startup phase has been completed.
*
* @param phase Which phase to check for completion
* @return boolean true if the given startup phase has completed.
*/
private boolean isComplete(Phase phase) {
return getStatus(phase) == Status.COMPLETE;
}
/**

59
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/startupprogress/TestStartupProgress.java
View File

@ -159,6 +159,14 @@ public void testFrozenAfterStartupCompletes() {
startupProgress.endStep(LOADING_FSIMAGE, step);
startupProgress.endPhase(LOADING_FSIMAGE);
StartupProgressView beforePhaseUpdate = startupProgress.createView();
// LOADING_FSIMAGE phase has been completed, but attempt more updates to it
Step fsimageStep2 = new Step(INODES);
startupProgress.beginStep(LOADING_FSIMAGE, fsimageStep2);
incrementCounter(startupProgress, LOADING_FSIMAGE, fsimageStep2, 1000000L);
startupProgress.endStep(LOADING_FSIMAGE, fsimageStep2);
// Force completion of phases, so that entire startup process is completed.
for (Phase phase: EnumSet.allOf(Phase.class)) {
if (startupProgress.getStatus(phase) != Status.COMPLETE) {
@ -191,26 +199,39 @@ public void testFrozenAfterStartupCompletes() {
// Expect that data was frozen after completion of entire startup process, so
// second set of updates and counter increments should have had no effect.
assertEquals(before.getCount(LOADING_FSIMAGE),
after.getCount(LOADING_FSIMAGE));
assertEquals(before.getCount(LOADING_FSIMAGE, step),
after.getCount(LOADING_FSIMAGE, step));
assertViewEquals(before, after, LOADING_FSIMAGE, step, fsimageStep2);
assertEquals(before.getElapsedTime(), after.getElapsedTime());
assertEquals(before.getElapsedTime(LOADING_FSIMAGE),
after.getElapsedTime(LOADING_FSIMAGE));
assertEquals(before.getElapsedTime(LOADING_FSIMAGE, step),
after.getElapsedTime(LOADING_FSIMAGE, step));
assertEquals(before.getFile(LOADING_FSIMAGE),
after.getFile(LOADING_FSIMAGE));
assertEquals(before.getSize(LOADING_FSIMAGE),
after.getSize(LOADING_FSIMAGE));
assertEquals(before.getTotal(LOADING_FSIMAGE),
after.getTotal(LOADING_FSIMAGE));
assertEquals(before.getTotal(LOADING_FSIMAGE, step),
after.getTotal(LOADING_FSIMAGE, step));
// After the phase was completed but before startup was completed,
// everything should be equal, except for the total elapsed time
assertViewEquals(beforePhaseUpdate, after, LOADING_FSIMAGE,
step, fsimageStep2);
assertFalse(after.getSteps(LOADING_EDITS).iterator().hasNext());
}
private void assertViewEquals(StartupProgressView view1,
StartupProgressView view2, Phase phaseToVerify, Step... stepsToVerify) {
assertEquals(view1.getCount(phaseToVerify),
view2.getCount(phaseToVerify));
assertEquals(view1.getElapsedTime(phaseToVerify),
view2.getElapsedTime(phaseToVerify));
assertEquals(view1.getFile(phaseToVerify),
view2.getFile(phaseToVerify));
assertEquals(view1.getSize(phaseToVerify),
view2.getSize(phaseToVerify));
assertEquals(view1.getTotal(phaseToVerify),
view2.getTotal(phaseToVerify));
for (Step step : stepsToVerify) {
assertEquals(view1.getCount(phaseToVerify, step),
view2.getCount(phaseToVerify, step));
assertEquals(view1.getElapsedTime(phaseToVerify, step),
view2.getElapsedTime(phaseToVerify, step));
assertEquals(view1.getTotal(phaseToVerify, step),
view2.getTotal(phaseToVerify, step));
}
}
@Test(timeout=10000)
public void testInitialState() {
StartupProgressView view = startupProgress.createView();
@ -375,7 +396,6 @@ public Void call() {
startupProgress.setTotal(phase, step, total);
incrementCounter(startupProgress, phase, step, 100L);
startupProgress.endStep(phase, step);
startupProgress.endPhase(phase);
return null;
}
});
@ -384,6 +404,11 @@ public Void call() {
exec.shutdown();
assertTrue(exec.awaitTermination(10000L, TimeUnit.MILLISECONDS));
}
// Once a phase ends, future modifications to the steps in that phase are
// ignored. Thus do not end the phases until after the other ops are done.
for (Phase phase : phases) {
startupProgress.endPhase(phase);
}
StartupProgressView view = startupProgress.createView();
assertNotNull(view);