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HADOOP-7472. RPC client should deal with IP address change. Contributed by Kihwal Lee. 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1156350 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Suresh Srinivas 2011-08-10 20:22:55 +00:00
parent 2d653c994c
commit 2a990ed646
2 changed files with 34 additions and 1 deletions
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3
hadoop-common/CHANGES.txt
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@ -311,6 +311,9 @@ Trunk (unreleased changes)
HADOOP-7525. Make arguments to test-patch optional. (tomwhite)
HADOOP-7472. RPC client should deal with IP address change.
(Kihwal Lee via suresh)
OPTIMIZATIONS
HADOOP-7333. Performance improvement in PureJavaCrc32. (Eric Caspole

32
hadoop-common/src/main/java/org/apache/hadoop/ipc/Client.java
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@ -405,6 +405,27 @@ public class Client {
saslRpcClient = new SaslRpcClient(authMethod, token, serverPrincipal);
return saslRpcClient.saslConnect(in2, out2);
}
/**
* Update the server address if the address corresponding to the host
* name has changed.
*
* @return true if an addr change was detected.
* @throws IOException when the hostname cannot be resolved.
*/
private synchronized boolean updateAddress() throws IOException {
// Do a fresh lookup with the old host name.
InetSocketAddress currentAddr = new InetSocketAddress(
server.getHostName(), server.getPort());
if (!server.equals(currentAddr)) {
LOG.warn("Address change detected. Old: " + server.toString() +
" New: " + currentAddr.toString());
server = currentAddr;
return true;
}
return false;
}
private synchronized void setupConnection() throws IOException {
short ioFailures = 0;
@ -435,19 +456,28 @@ public class Client {
}
// connection time out is 20s
NetUtils.connect(this.socket, remoteId.getAddress(), 20000);
NetUtils.connect(this.socket, server, 20000);
if (rpcTimeout > 0) {
pingInterval = rpcTimeout; // rpcTimeout overwrites pingInterval
}
this.socket.setSoTimeout(pingInterval);
return;
} catch (SocketTimeoutException toe) {
/* Check for an address change and update the local reference.
* Reset the failure counter if the address was changed
*/
if (updateAddress()) {
timeoutFailures = ioFailures = 0;
}
/*
* The max number of retries is 45, which amounts to 20s*45 = 15
* minutes retries.
*/
handleConnectionFailure(timeoutFailures++, 45, toe);
} catch (IOException ie) {
if (updateAddress()) {
timeoutFailures = ioFailures = 0;
}
handleConnectionFailure(ioFailures++, maxRetries, ie);
}
}