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Posted to common-commits@hadoop.apache.org by ar...@apache.org on 2016/09/11 01:38:08 UTC
[3/3] hadoop git commit: HDFS-10830. FsDatasetImpl#removeVolumes
crashes with IllegalMonitorStateException when vol being removed is in use.
(Arpit Agarwal and Manoj Govindassamy)
HDFS-10830. FsDatasetImpl#removeVolumes crashes with IllegalMonitorStateException when vol being removed is in use. (Arpit Agarwal and Manoj Govindassamy)
Project: http://git-wip-us.apache.org/repos/asf/hadoop/repo
Commit: http://git-wip-us.apache.org/repos/asf/hadoop/commit/ed35f990
Tree: http://git-wip-us.apache.org/repos/asf/hadoop/tree/ed35f990
Diff: http://git-wip-us.apache.org/repos/asf/hadoop/diff/ed35f990
Branch: refs/heads/branch-2.8
Commit: ed35f99045b088996111b1d67e52bb5c0b14f804
Parents: 04f620c
Author: Arpit Agarwal <ar...@apache.org>
Authored: Sat Sep 10 18:34:28 2016 -0700
Committer: Arpit Agarwal <ar...@apache.org>
Committed: Sat Sep 10 18:34:28 2016 -0700
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.../org/apache/hadoop/util/AutoCloseableLock.java | 8 ++++++++
.../datanode/fsdataset/impl/FsDatasetImpl.java | 7 ++++++-
.../datanode/fsdataset/impl/FsVolumeList.java | 18 ++++++++++++------
3 files changed, 26 insertions(+), 7 deletions(-)
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http://git-wip-us.apache.org/repos/asf/hadoop/blob/ed35f990/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/AutoCloseableLock.java
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diff --git a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/AutoCloseableLock.java b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/AutoCloseableLock.java
index d920bc6..d7fe93d 100644
--- a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/AutoCloseableLock.java
+++ b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/AutoCloseableLock.java
@@ -18,6 +18,7 @@
package org.apache.hadoop.util;
import java.util.concurrent.locks.Lock;
+import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.ReentrantLock;
import com.google.common.annotations.VisibleForTesting;
@@ -135,4 +136,11 @@ public class AutoCloseableLock implements AutoCloseable {
throw new UnsupportedOperationException();
}
+ /**
+ * See {@link ReentrantLock#newCondition()}.
+ * @return the Condition object
+ */
+ public Condition newCondition() {
+ return lock.newCondition();
+ }
}
http://git-wip-us.apache.org/repos/asf/hadoop/blob/ed35f990/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsDatasetImpl.java
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diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsDatasetImpl.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsDatasetImpl.java
index 1f0d975..a6730cc 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsDatasetImpl.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsDatasetImpl.java
@@ -42,6 +42,7 @@ import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.*;
import java.util.concurrent.Executor;
+import java.util.concurrent.locks.Condition;
import java.util.concurrent.TimeUnit;
import javax.management.NotCompliantMBeanException;
@@ -271,6 +272,8 @@ class FsDatasetImpl implements FsDatasetSpi<FsVolumeImpl> {
private final int maxDataLength;
private final AutoCloseableLock datasetLock;
+ private final Condition datasetLockCondition;
+
/**
* An FSDataset has a directory where it loads its data files.
*/
@@ -288,6 +291,8 @@ class FsDatasetImpl implements FsDatasetSpi<FsVolumeImpl> {
DFSConfigKeys.DFS_LOCK_SUPPRESS_WARNING_INTERVAL_DEFAULT,
TimeUnit.MILLISECONDS),
300));
+ this.datasetLockCondition = datasetLock.newCondition();
+
// The number of volumes required for operation is the total number
// of volumes minus the number of failed volumes we can tolerate.
volFailuresTolerated = datanode.getDnConf().getVolFailuresTolerated();
@@ -519,7 +524,7 @@ class FsDatasetImpl implements FsDatasetSpi<FsVolumeImpl> {
// Disable the volume from the service.
asyncDiskService.removeVolume(sd.getCurrentDir());
volumes.removeVolume(absRoot, clearFailure);
- volumes.waitVolumeRemoved(5000, this);
+ volumes.waitVolumeRemoved(5000, datasetLockCondition);
// Removed all replica information for the blocks on the volume.
// Unlike updating the volumeMap in addVolume(), this operation does
http://git-wip-us.apache.org/repos/asf/hadoop/blob/ed35f990/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsVolumeList.java
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diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsVolumeList.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsVolumeList.java
index ea4d597..634ad42 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsVolumeList.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsVolumeList.java
@@ -31,6 +31,8 @@ import java.util.Map;
import java.util.TreeMap;
import java.util.Set;
import java.util.concurrent.CopyOnWriteArrayList;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.locks.Condition;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.StorageType;
@@ -41,6 +43,7 @@ import org.apache.hadoop.hdfs.server.datanode.fsdataset.VolumeChoosingPolicy;
import org.apache.hadoop.hdfs.server.datanode.BlockScanner;
import org.apache.hadoop.hdfs.server.protocol.DatanodeStorage;
import org.apache.hadoop.io.IOUtils;
+import org.apache.hadoop.util.AutoCloseableLock;
import org.apache.hadoop.util.DiskChecker.DiskErrorException;
import org.apache.hadoop.util.Time;
@@ -52,7 +55,8 @@ class FsVolumeList {
Collections.synchronizedMap(new TreeMap<String, VolumeFailureInfo>());
private final ConcurrentLinkedQueue<FsVolumeImpl> volumesBeingRemoved =
new ConcurrentLinkedQueue<>();
- private Object checkDirsMutex = new Object();
+ private final AutoCloseableLock checkDirsLock;
+ private final Condition checkDirsLockCondition;
private final VolumeChoosingPolicy<FsVolumeImpl> blockChooser;
private final BlockScanner blockScanner;
@@ -62,6 +66,8 @@ class FsVolumeList {
VolumeChoosingPolicy<FsVolumeImpl> blockChooser) {
this.blockChooser = blockChooser;
this.blockScanner = blockScanner;
+ this.checkDirsLock = new AutoCloseableLock();
+ this.checkDirsLockCondition = checkDirsLock.newCondition();
for (VolumeFailureInfo volumeFailureInfo: initialVolumeFailureInfos) {
volumeFailureInfos.put(volumeFailureInfo.getFailedStorageLocation(),
volumeFailureInfo);
@@ -224,12 +230,12 @@ class FsVolumeList {
/**
* Calls {@link FsVolumeImpl#checkDirs()} on each volume.
*
- * Use checkDirsMutext to allow only one instance of checkDirs() call
+ * Use {@link checkDirsLock} to allow only one instance of checkDirs() call.
*
* @return list of all the failed volumes.
*/
Set<File> checkDirs() {
- synchronized(checkDirsMutex) {
+ try (AutoCloseableLock lock = checkDirsLock.acquire()) {
Set<File> failedVols = null;
// Make a copy of volumes for performing modification
@@ -260,7 +266,7 @@ class FsVolumeList {
+ " failure volumes.");
}
- waitVolumeRemoved(5000, checkDirsMutex);
+ waitVolumeRemoved(5000, checkDirsLockCondition);
return failedVols;
}
}
@@ -271,13 +277,13 @@ class FsVolumeList {
*
* @param sleepMillis interval to recheck.
*/
- void waitVolumeRemoved(int sleepMillis, Object monitor) {
+ void waitVolumeRemoved(int sleepMillis, Condition condition) {
while (!checkVolumesRemoved()) {
if (FsDatasetImpl.LOG.isDebugEnabled()) {
FsDatasetImpl.LOG.debug("Waiting for volume reference to be released.");
}
try {
- monitor.wait(sleepMillis);
+ condition.await(sleepMillis, TimeUnit.MILLISECONDS);
} catch (InterruptedException e) {
FsDatasetImpl.LOG.info("Thread interrupted when waiting for "
+ "volume reference to be released.");
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