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HDFS-7266. HDFS Peercache enabled check should not lock on object (awang via cmccabe)

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This commit is contained in:
Colin Patrick Mccabe 2014-10-20 18:24:53 -07:00
parent e90718fa5a
commit 4799570dfd
2 changed files with 12 additions and 3 deletions
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3
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -381,6 +381,9 @@ Release 2.7.0 - UNRELEASED
HDFS-6252. Phase out the old web UI in HDFS. (wheat9)
HDFS-7266. HDFS Peercache enabled check should not lock on object (awang
via cmccabe)
OPTIMIZATIONS
BUG FIXES

10
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/PeerCache.java
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@ -140,12 +140,15 @@ public String toString() {
* @return An open Peer connected to the DN, or null if none
* was found.
*/
public synchronized Peer get(DatanodeID dnId, boolean isDomain) {
public Peer get(DatanodeID dnId, boolean isDomain) {
if (capacity <= 0) { // disabled
return null;
}
return getInternal(dnId, isDomain);
}
private synchronized Peer getInternal(DatanodeID dnId, boolean isDomain) {
List<Value> sockStreamList = multimap.get(new Key(dnId, isDomain));
if (sockStreamList == null) {
return null;
@ -174,7 +177,7 @@ public synchronized Peer get(DatanodeID dnId, boolean isDomain) {
/**
* Give an unused socket to the cache.
*/
public synchronized void put(DatanodeID dnId, Peer peer) {
public void put(DatanodeID dnId, Peer peer) {
Preconditions.checkNotNull(dnId);
Preconditions.checkNotNull(peer);
if (peer.isClosed()) return;
@ -183,7 +186,10 @@ public synchronized void put(DatanodeID dnId, Peer peer) {
IOUtils.cleanup(LOG, peer);
return;
}
putInternal(dnId, peer);
}
private synchronized void putInternal(DatanodeID dnId, Peer peer) {
startExpiryDaemon();
if (capacity == multimap.size()) {