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HDDS-9819. Recon - Potential memory overflow in Container Health Task. #5841

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Merged
adoroszlai merged 11 commits into from
Jan 14, 2024
Merged

HDDS-9819. Recon - Potential memory overflow in Container Health Task. #5841

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6f411d1
HDDS-9819.Recon - Potential memory overflow in Container Health Task.
Dec 20, 2023
c77e3d5
Fixed review comments.
Dec 21, 2023
7a7e68f
HDDS-9819.Fixed Test case failures in TestReconTasks.
Jan 2, 2024
88b671f
HDDS-9819.Fixed Test case failures in TestReconTasks.
Jan 2, 2024
1a2c4ce
Merge remote-tracking branch 'origin/master' into HDDS-9819
adoroszlai Jan 3, 2024
720d24b
Merge remote-tracking branch 'origin/master' into HDDS-9819
Jan 10, 2024
81f271c
HDDS-9819.Fixed review comments.
Jan 10, 2024
903805a
HDDS-9819.Fixed review comments.
Jan 10, 2024
8612090
HDDS-9819.Fixed review comments.
Jan 11, 2024
0abeec2
Merge remote-tracking branch 'origin/master' into HDDS-9819
adoroszlai Jan 14, 2024
1fb54db
restore changes from HDDS-10034 (lost in merge)
adoroszlai Jan 14, 2024
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7 changes: 2 additions & 5 deletions ...op-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/recon/TestReconTasks.java
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Original file line number Diff line number Diff line change
Expand Up @@ -72,8 +72,8 @@ public void init() throws Exception {
taskConfig.setMissingContainerTaskInterval(Duration.ofSeconds(15));
conf.setFromObject(taskConfig);

conf.set("ozone.scm.stale.node.interval", "10s");
conf.set("ozone.scm.dead.node.interval", "20s");
conf.set("ozone.scm.stale.node.interval", "6s");
conf.set("ozone.scm.dead.node.interval", "10s");
cluster = MiniOzoneCluster.newBuilder(conf).setNumDatanodes(1)
.includeRecon(true).build();
cluster.waitForClusterToBeReady();
Expand Down Expand Up @@ -102,9 +102,6 @@ public void testSyncSCMContainerInfo() throws Exception {
final ContainerInfo container2 = scmContainerManager.allocateContainer(
RatisReplicationConfig.getInstance(
HddsProtos.ReplicationFactor.ONE), "admin");
reconContainerManager.allocateContainer(
RatisReplicationConfig.getInstance(
HddsProtos.ReplicationFactor.ONE), "admin");
scmContainerManager.updateContainerState(container1.containerID(),
HddsProtos.LifeCycleEvent.FINALIZE);
scmContainerManager.updateContainerState(container2.containerID(),
Expand Down
29 changes: 25 additions & 4 deletions hadoop-ozone/recon/src/main/java/org/apache/hadoop/ozone/recon/fsck/ContainerHealthTask.java
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Expand Up @@ -53,6 +53,7 @@
import org.slf4j.LoggerFactory;

import static org.apache.hadoop.ozone.recon.ReconConstants.CONTAINER_COUNT;
import static org.apache.hadoop.ozone.recon.ReconConstants.DEFAULT_FETCH_COUNT;
import static org.apache.hadoop.ozone.recon.ReconConstants.TOTAL_KEYS;
import static org.apache.hadoop.ozone.recon.ReconConstants.TOTAL_USED_BYTES;

Expand Down Expand Up @@ -131,8 +132,23 @@ public void triggerContainerHealthCheck() {
LOG.info("Container Health task thread took {} milliseconds to" +
" process {} existing database records.",
Time.monotonicNow() - start, existingCount);

checkAndProcessContainers(unhealthyContainerStateStatsMap, currentTime);
processedContainers.clear();
} finally {
lock.writeLock().unlock();
}
}

private void checkAndProcessContainers(
Map<UnHealthyContainerStates, Map<String, Long>>
unhealthyContainerStateStatsMap, long currentTime) {
ContainerID startID = ContainerID.valueOf(1);
List<ContainerInfo> containers = containerManager.getContainers(startID,
Integer.parseInt(DEFAULT_FETCH_COUNT));
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@ArafatKhan2198 ArafatKhan2198 Jan 8, 2024 •
edited
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Could we replace the usage of Integer.parseInt(DEFAULT_FETCH_COUNT) with a named constant as DEFAULT_FETCH_COUNT is a constant.

private static final int FETCH_COUNT = Integer.parseInt(DEFAULT_FETCH_COUNT);

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@devmadhuu devmadhuu Jan 10, 2024

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Ok.

long start;
while (!containers.isEmpty()) {
start = Time.monotonicNow();
final List<ContainerInfo> containers = containerManager.getContainers();
containers.stream()
.filter(c -> !processedContainers.contains(c))
.forEach(c -> processContainer(c, currentTime,
Expand All @@ -142,9 +158,14 @@ public void triggerContainerHealthCheck() {
" processing {} containers.", Time.monotonicNow() - start,
containers.size());
logUnhealthyContainerStats(unhealthyContainerStateStatsMap);
processedContainers.clear();
} finally {
lock.writeLock().unlock();
if (containers.size() > Integer.parseInt(DEFAULT_FETCH_COUNT)) {
startID = ContainerID.valueOf(
containers.get(containers.size() - 1).getContainerID());
containers.clear();
containers = containerManager.getContainers(startID,
Integer.parseInt(DEFAULT_FETCH_COUNT));
}
containers.clear();
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@ArafatKhan2198 ArafatKhan2198 Jan 8, 2024 •
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The containers.clear(); statement inside the if block is meant to clear the list before fetching the next batch. However, the last containers.clear(); statement just outside the if block seems redundant since the loop condition (while (!containers.isEmpty())) ensures that it's only executed when containers is empty.?

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@devmadhuu devmadhuu Jan 10, 2024

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@ArafatKhan2198 I couldn't understand this comment, as I don't see containers.clear() outside the loop. Can you pls clarify ?

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@ArafatKhan2198 ArafatKhan2198 Jan 10, 2024

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Apologies for the earlier mistake in the comment. I have now corrected it. Please take a look.

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@devmadhuu devmadhuu Jan 10, 2024

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As discussed, we have a case where last iteration in batch will not execute the if condition , so need to clear -off any in memory.

}
}

Expand Down
10 changes: 7 additions & 3 deletions ...ozone/recon/src/test/java/org/apache/hadoop/ozone/recon/fsck/TestContainerHealthTask.java
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Expand Up @@ -22,6 +22,8 @@
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.ArgumentMatchers.anyInt;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

Expand Down Expand Up @@ -96,7 +98,8 @@ public void testRun() throws Exception {
List<ContainerInfo> mockContainers = getMockContainers(7);
when(scmMock.getScmServiceProvider()).thenReturn(scmClientMock);
when(scmMock.getContainerManager()).thenReturn(containerManagerMock);
when(containerManagerMock.getContainers()).thenReturn(mockContainers);
when(containerManagerMock.getContainers(any(ContainerID.class),
anyInt())).thenReturn(mockContainers);
for (ContainerInfo c : mockContainers) {
when(containerManagerMock.getContainer(c.containerID())).thenReturn(c);
when(scmClientMock.getContainerWithPipeline(c.getContainerID()))
Expand Down Expand Up @@ -151,7 +154,7 @@ public void testRun() throws Exception {
reconTaskStatusDao, containerHealthSchemaManager,
placementMock, reconTaskConfig, reconContainerMetadataManager);
containerHealthTask.start();
LambdaTestUtils.await(6000, 1000, () ->
LambdaTestUtils.await(60000, 1000, () ->
(unHealthyContainersTableHandle.count() == 6));
UnhealthyContainers rec =
unHealthyContainersTableHandle.fetchByContainerId(1L).get(0);
Expand Down Expand Up @@ -268,7 +271,8 @@ public void testDeletedContainer() throws Exception {
List<ContainerInfo> mockContainers = getMockContainers(3);
when(scmMock.getScmServiceProvider()).thenReturn(scmClientMock);
when(scmMock.getContainerManager()).thenReturn(containerManagerMock);
when(containerManagerMock.getContainers()).thenReturn(mockContainers);
when(containerManagerMock.getContainers(any(ContainerID.class),
anyInt())).thenReturn(mockContainers);
for (ContainerInfo c : mockContainers) {
when(containerManagerMock.getContainer(c.containerID())).thenReturn(c);
when(scmClientMock.getContainerWithPipeline(c.getContainerID()))
Expand Down