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HBASE-3653 : Parallelize Server Requests on HBase Client 

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1082648 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Nicolas Spiegelberg 2011-03-17 19:08:50 +00:00
parent a50c7d8dfc
commit b9e1d6c698
2 changed files with 25 additions and 14 deletions
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1
CHANGES.txt
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@ -77,6 +77,7 @@ Release 0.91.0 - Unreleased
Export (Subbu M Iyer via Stack)
HBASE-3440 Clean out load_table.rb and make sure all roads lead to
completebulkload tool (Vidhyashankar Venkataraman via Stack)
HBASE-3653 Parallelize Server Requests on HBase Client
TASK
HBASE-3559 Move report of split to master OFF the heartbeat channel

20
src/main/java/org/apache/hadoop/hbase/client/HConnectionManager.java
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@ -240,6 +240,7 @@ public class HConnectionManager {
private final Map<String, HRegionInterface> servers =
new ConcurrentHashMap<String, HRegionInterface>();
private final ConcurrentHashMap<String, String> connectionLock = new ConcurrentHashMap<String, String>();
/**
* Map of table to table {@link HRegionLocation}s. The table key is made
@ -941,21 +942,30 @@ public class HConnectionManager {
getMaster();
}
HRegionInterface server;
synchronized (this.servers) {
// See if we already have a connection
server = this.servers.get(regionServer.toString());
if (server == null) { // Get a connection
String rsName = regionServer.toString();
// See if we already have a connection (common case)
server = this.servers.get(rsName);
if (server == null) {
// create a unique lock for this RS (if necessary)
this.connectionLock.putIfAbsent(rsName, rsName);
// get the RS lock
synchronized (this.connectionLock.get(rsName)) {
// do one more lookup in case we were stalled above
server = this.servers.get(rsName);
if (server == null) {
try {
// definitely a cache miss. establish an RPC for this RS
server = (HRegionInterface) HBaseRPC.waitForProxy(
serverInterfaceClass, HRegionInterface.VERSION,
regionServer.getInetSocketAddress(), this.conf,
this.maxRPCAttempts, this.rpcTimeout, this.rpcTimeout);
this.servers.put(rsName, server);
} catch (RemoteException e) {
LOG.warn("RemoteException connecting to RS", e);
// Throw what the RemoteException was carrying.
throw RemoteExceptionHandler.decodeRemoteException(e);
}
this.servers.put(regionServer.toString(), server);
}
}
}
return server;