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HADOOP-9932. Improper synchronization in RetryCache. Contributed by Kihwal Lee.

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git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1520126 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Kihwal Lee 2013-09-04 19:57:44 +00:00
parent 0e0271b5fd
commit cd663baf16
2 changed files with 23 additions and 7 deletions
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2
hadoop-common-project/hadoop-common/CHANGES.txt
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@ -449,6 +449,8 @@ Release 2.1.1-beta - UNRELEASED
HADOOP-9924. FileUtil.createJarWithClassPath() does not generate relative
classpath correctly. (Shanyu Zhao via ivanmi)
HADOOP-9932. Improper synchronization in RetryCache. (kihwal)
Release 2.1.0-beta - 2013-08-22
INCOMPATIBLE CHANGES

28
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/RetryCache.java
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@ -76,6 +76,12 @@ public static class CacheEntry implements LightWeightCache.Entry {
this.expirationTime = expirationTime;
}
CacheEntry(byte[] clientId, int callId, long expirationTime,
boolean success) {
this(clientId, callId, expirationTime);
this.state = success ? SUCCESS : FAILED;
}
private static int hashCode(long value) {
return (int)(value ^ (value >>> 32));
}
@ -147,6 +153,12 @@ public static class CacheEntryWithPayload extends CacheEntry {
this.payload = payload;
}
CacheEntryWithPayload(byte[] clientId, int callId, Object payload,
long expirationTime, boolean success) {
super(clientId, callId, expirationTime, success);
this.payload = payload;
}
/** Override equals to avoid findbugs warnings */
@Override
public boolean equals(Object obj) {
@ -253,18 +265,20 @@ private CacheEntry waitForCompletion(CacheEntry newEntry) {
*/
public void addCacheEntry(byte[] clientId, int callId) {
CacheEntry newEntry = new CacheEntry(clientId, callId, System.nanoTime()
+ expirationTime);
newEntry.completed(true);
set.put(newEntry);
+ expirationTime, true);
synchronized(this) {
set.put(newEntry);
}
}
public void addCacheEntryWithPayload(byte[] clientId, int callId,
Object payload) {
CacheEntry newEntry = new CacheEntryWithPayload(clientId, callId, payload,
System.nanoTime() + expirationTime);
// since the entry is loaded from editlog, we can assume it succeeded.
newEntry.completed(true);
set.put(newEntry);
CacheEntry newEntry = new CacheEntryWithPayload(clientId, callId, payload,
System.nanoTime() + expirationTime, true);
synchronized(this) {
set.put(newEntry);
}
}
private static CacheEntry newEntry(long expirationTime) {