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MAPREDUCE-6473. Job submission can take a long time during Cluster initialization. Contributed by Kuhu Shukla 

(cherry picked from commit f657b54281)
This commit is contained in:
Jason Lowe 2016-01-12 23:56:23 +00:00
parent c3f4cb927a
commit a22a7f61e4
2 changed files with 44 additions and 28 deletions
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3
hadoop-mapreduce-project/CHANGES.txt
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@ -159,6 +159,9 @@ Release 2.8.0 - UNRELEASED
MAPREDUCE-6394. Speed up Task processing loop in HsTasksBlock#render()
(Ray Chiang via jlowe)
MAPREDUCE-6473. Job submission can take a long time during Cluster
initialization (Kuhu Shukla via jlowe)
BUG FIXES
MAPREDUCE-6314. TestPipeApplication fails on trunk.

69
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/Cluster.java
View File

@ -66,7 +66,23 @@ public class Cluster {
private static ServiceLoader<ClientProtocolProvider> frameworkLoader =
ServiceLoader.load(ClientProtocolProvider.class);
private volatile List<ClientProtocolProvider> providerList = null;
private void initProviderList() {
if (providerList == null) {
synchronized (frameworkLoader) {
if (providerList == null) {
List<ClientProtocolProvider> localProviderList =
new ArrayList<ClientProtocolProvider>();
for (ClientProtocolProvider provider : frameworkLoader) {
localProviderList.add(provider);
}
providerList = localProviderList;
}
}
}
}
static {
ConfigUtil.loadResources();
}
@ -85,34 +101,31 @@ public class Cluster {
private void initialize(InetSocketAddress jobTrackAddr, Configuration conf)
throws IOException {
synchronized (frameworkLoader) {
for (ClientProtocolProvider provider : frameworkLoader) {
LOG.debug("Trying ClientProtocolProvider : "
+ provider.getClass().getName());
ClientProtocol clientProtocol = null;
try {
if (jobTrackAddr == null) {
clientProtocol = provider.create(conf);
} else {
clientProtocol = provider.create(jobTrackAddr, conf);
}
if (clientProtocol != null) {
clientProtocolProvider = provider;
client = clientProtocol;
LOG.debug("Picked " + provider.getClass().getName()
+ " as the ClientProtocolProvider");
break;
}
else {
LOG.debug("Cannot pick " + provider.getClass().getName()
+ " as the ClientProtocolProvider - returned null protocol");
}
}
catch (Exception e) {
LOG.info("Failed to use " + provider.getClass().getName()
+ " due to error: ", e);
initProviderList();
for (ClientProtocolProvider provider : providerList) {
LOG.debug("Trying ClientProtocolProvider : "
+ provider.getClass().getName());
ClientProtocol clientProtocol = null;
try {
if (jobTrackAddr == null) {
clientProtocol = provider.create(conf);
} else {
clientProtocol = provider.create(jobTrackAddr, conf);
}
if (clientProtocol != null) {
clientProtocolProvider = provider;
client = clientProtocol;
LOG.debug("Picked " + provider.getClass().getName()
+ " as the ClientProtocolProvider");
break;
} else {
LOG.debug("Cannot pick " + provider.getClass().getName()
+ " as the ClientProtocolProvider - returned null protocol");
}
} catch (Exception e) {
LOG.info("Failed to use " + provider.getClass().getName()
+ " due to error: ", e);
}
}