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HDFS-2626. BPOfferService.verifyAndSetNamespaceInfo needs to be synchronized. Contributed by Todd Lipcon.

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git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-1623@1210340 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Todd Lipcon 2011-12-05 06:36:00 +00:00
parent 74b1f069cc
commit b3f28dbb3d
3 changed files with 4 additions and 4 deletions
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2
hadoop-hdfs-project/hadoop-hdfs/CHANGES.HDFS-1623.txt
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@ -39,3 +39,5 @@ HDFS-2622. Fix TestDFSUpgrade in HA branch. (todd)
HDFS-2612. Handle refreshNameNodes in federated HA clusters (todd)
HDFS-2623. Add test case for hot standby capability (todd)
HDFS-2626. BPOfferService.verifyAndSetNamespaceInfo needs to be synchronized (todd)

2
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BPOfferService.java
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@ -262,7 +262,7 @@ DataNode getDataNode() {
* verifies that this namespace matches (eg to prevent a misconfiguration
* where a StandbyNode from a different cluster is specified)
*/
void verifyAndSetNamespaceInfo(NamespaceInfo nsInfo) throws IOException {
synchronized void verifyAndSetNamespaceInfo(NamespaceInfo nsInfo) throws IOException {
if (this.bpNSInfo == null) {
this.bpNSInfo = nsInfo;

2
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BPServiceActor.java
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@ -336,8 +336,6 @@ DatanodeCommand blockReport() throws IOException {
HeartbeatResponse sendHeartBeat() throws IOException {
LOG.info("heartbeat: " + this);
// TODO: saw an NPE here - maybe if the two BPOS register at
// same time, this one won't block on the other one?
return bpNamenode.sendHeartbeat(bpRegistration,
dn.getFSDataset().getCapacity(),
dn.getFSDataset().getDfsUsed(),