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MAPREDUCE-3988. mapreduce.job.local.dir doesn't point to a single directory on a node. (Eric Payne via bobby) 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1309086 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Robert Joseph Evans 2012-04-03 18:29:40 +00:00
parent 20184e7ddc
commit b45c450026
3 changed files with 36 additions and 5 deletions
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3
hadoop-mapreduce-project/CHANGES.txt
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@ -231,6 +231,9 @@ Release 0.23.3 - UNRELEASED
MAPREDUCE-4062. AM Launcher thread can hang forever (tgraves via bobby)
MAPREDUCE-3988. mapreduce.job.local.dir doesn't point to a single directory
on a node. (Eric Payne via bobby)
Release 0.23.2 - UNRELEASED
INCOMPATIBLE CHANGES

27
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapred/YarnChild.java
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@ -54,6 +54,7 @@ import org.apache.hadoop.security.Credentials;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.security.token.Token;
import org.apache.hadoop.security.token.TokenIdentifier;
import org.apache.hadoop.util.DiskChecker.DiskErrorException;
import org.apache.hadoop.util.StringUtils;
import org.apache.hadoop.yarn.api.ApplicationConstants;
import org.apache.log4j.LogManager;
@ -236,12 +237,34 @@ class YarnChild {
job.setStrings(MRConfig.LOCAL_DIR, localSysDirs);
LOG.info(MRConfig.LOCAL_DIR + " for child: " + job.get(MRConfig.LOCAL_DIR));
LocalDirAllocator lDirAlloc = new LocalDirAllocator(MRConfig.LOCAL_DIR);
Path workDir = lDirAlloc.getLocalPathForWrite("work", job);
Path workDir = null;
// First, try to find the JOB_LOCAL_DIR on this host.
try {
workDir = lDirAlloc.getLocalPathToRead("work", job);
} catch (DiskErrorException e) {
// DiskErrorException means dir not found. If not found, it will
// be created below.
}
if (workDir == null) {
// JOB_LOCAL_DIR doesn't exist on this host -- Create it.
workDir = lDirAlloc.getLocalPathForWrite("work", job);
FileSystem lfs = FileSystem.getLocal(job).getRaw();
if (!lfs.mkdirs(workDir)) {
boolean madeDir = false;
try {
madeDir = lfs.mkdirs(workDir);
} catch (FileAlreadyExistsException e) {
// Since all tasks will be running in their own JVM, the race condition
// exists where multiple tasks could be trying to create this directory
// at the same time. If this task loses the race, it's okay because
// the directory already exists.
madeDir = true;
workDir = lDirAlloc.getLocalPathToRead("work", job);
}
if (!madeDir) {
throw new IOException("Mkdirs failed to create "
+ workDir.toString());
}
}
job.set(MRJobConfig.JOB_LOCAL_DIR,workDir.toString());
}

5
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/TestMiniMRChildTask.java
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@ -41,6 +41,7 @@ import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.mapred.lib.IdentityReducer;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.MRJobConfig;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.mapreduce.v2.MiniMRYarnCluster;
@ -228,6 +229,10 @@ public class TestMiniMRChildTask {
// check if X=$(tt's X var):/tmp for an old env variable inherited from
// the tt
checkEnv("PATH", path + ":/tmp", "noappend");
String jobLocalDir = job.get(MRJobConfig.JOB_LOCAL_DIR);
assertNotNull(MRJobConfig.JOB_LOCAL_DIR + " is null",
jobLocalDir);
}
public void map(WritableComparable key, Writable value,