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HDFS-3375. Put client name in DataXceiver thread name for readBlock and keepalive. Contributed by Todd Lipcon.

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git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1335270 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Todd Lipcon 2012-05-07 21:34:30 +00:00
parent 07280c9761
commit 7aa2889f82
2 changed files with 19 additions and 3 deletions
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3
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -428,6 +428,9 @@ Release 2.0.0 - UNRELEASED
HDFS-3365. Enable users to disable socket caching in DFS client
configuration (todd)
HDFS-3375. Put client name in DataXceiver thread name for readBlock
and keepalive (todd)
OPTIMIZATIONS
HDFS-3024. Improve performance of stringification in addStoredBlock (todd)

19
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataXceiver.java
View File

@ -86,6 +86,12 @@ class DataXceiver extends Receiver implements Runnable {
private long opStartTime; //the start time of receiving an Op
private final SocketInputWrapper socketInputWrapper;
/**
* Client Name used in previous operation. Not available on first request
* on the socket.
*/
private String previousOpClientName;
public static DataXceiver create(Socket s, DataNode dn,
DataXceiverServer dataXceiverServer) throws IOException {
@ -122,7 +128,11 @@ private DataXceiver(Socket s,
*/
private void updateCurrentThreadName(String status) {
StringBuilder sb = new StringBuilder();
sb.append("DataXceiver for client ").append(remoteAddress);
sb.append("DataXceiver for client ");
if (previousOpClientName != null) {
sb.append(previousOpClientName).append(" at ");
}
sb.append(remoteAddress);
if (status != null) {
sb.append(" [").append(status).append("]");
}
@ -202,6 +212,8 @@ public void readBlock(final ExtendedBlock block,
final String clientName,
final long blockOffset,
final long length) throws IOException {
previousOpClientName = clientName;
OutputStream baseStream = NetUtils.getOutputStream(s,
dnConf.socketWriteTimeout);
DataOutputStream out = new DataOutputStream(new BufferedOutputStream(
@ -295,7 +307,8 @@ public void writeBlock(final ExtendedBlock block,
final long maxBytesRcvd,
final long latestGenerationStamp,
DataChecksum requestedChecksum) throws IOException {
updateCurrentThreadName("Receiving block " + block + " client=" + clientname);
previousOpClientName = clientname;
updateCurrentThreadName("Receiving block " + block);
final boolean isDatanode = clientname.length() == 0;
final boolean isClient = !isDatanode;
final boolean isTransfer = stage == BlockConstructionStage.TRANSFER_RBW
@ -502,7 +515,7 @@ public void transferBlock(final ExtendedBlock blk,
final DatanodeInfo[] targets) throws IOException {
checkAccess(null, true, blk, blockToken,
Op.TRANSFER_BLOCK, BlockTokenSecretManager.AccessMode.COPY);
previousOpClientName = clientName;
updateCurrentThreadName(Op.TRANSFER_BLOCK + " " + blk);
final DataOutputStream out = new DataOutputStream(