/// <exception cref="System.IO.IOException"/>
/// <exception cref="Org.Apache.Hadoop.Yarn.Exceptions.YarnException"/>
public virtual void LaunchAM(ApplicationAttemptId attemptId)
{
Credentials credentials = new Credentials();
Org.Apache.Hadoop.Security.Token.Token <AMRMTokenIdentifier> token = rmClient.GetAMRMToken
(attemptId.GetApplicationId());
// Service will be empty but that's okay, we are just passing down only
// AMRMToken down to the real AM which eventually sets the correct
// service-address.
credentials.AddToken(token.GetService(), token);
FilePath tokenFile = FilePath.CreateTempFile("unmanagedAMRMToken", string.Empty,
new FilePath(Runtime.GetProperty("user.dir")));
try
{
FileUtil.Chmod(tokenFile.GetAbsolutePath(), "600");
}
catch (Exception ex)
{
throw new RuntimeException(ex);
}
tokenFile.DeleteOnExit();
DataOutputStream os = new DataOutputStream(new FileOutputStream(tokenFile, true));
credentials.WriteTokenStorageToStream(os);
os.Close();
IDictionary <string, string> env = Sharpen.Runtime.GetEnv();
AList <string> envAMList = new AList <string>();
bool setClasspath = false;
foreach (KeyValuePair <string, string> entry in env)
{
string key = entry.Key;
string value = entry.Value;
if (key.Equals("CLASSPATH"))
{
setClasspath = true;
if (classpath != null)
{
value = value + FilePath.pathSeparator + classpath;
}
}
envAMList.AddItem(key + "=" + value);
}
if (!setClasspath && classpath != null)
{
envAMList.AddItem("CLASSPATH=" + classpath);
}
ContainerId containerId = ContainerId.NewContainerId(attemptId, 0);
string hostname = Sharpen.Runtime.GetLocalHost().GetHostName();
envAMList.AddItem(ApplicationConstants.Environment.ContainerId.ToString() + "=" +
containerId);
envAMList.AddItem(ApplicationConstants.Environment.NmHost.ToString() + "=" + hostname
);
envAMList.AddItem(ApplicationConstants.Environment.NmHttpPort.ToString() + "=0");
envAMList.AddItem(ApplicationConstants.Environment.NmPort.ToString() + "=0");
envAMList.AddItem(ApplicationConstants.Environment.LocalDirs.ToString() + "= /tmp"
);
envAMList.AddItem(ApplicationConstants.AppSubmitTimeEnv + "=" + Runtime.CurrentTimeMillis
());
envAMList.AddItem(ApplicationConstants.ContainerTokenFileEnvName + "=" + tokenFile
.GetAbsolutePath());
string[] envAM = new string[envAMList.Count];
SystemProcess amProc = Runtime.GetRuntime().Exec(amCmd, Sharpen.Collections.ToArray
(envAMList, envAM));
BufferedReader errReader = new BufferedReader(new InputStreamReader(amProc.GetErrorStream
(), Sharpen.Extensions.GetEncoding("UTF-8")));
BufferedReader inReader = new BufferedReader(new InputStreamReader(amProc.GetInputStream
(), Sharpen.Extensions.GetEncoding("UTF-8")));
// read error and input streams as this would free up the buffers
// free the error stream buffer
Sharpen.Thread errThread = new _Thread_244(errReader);
Sharpen.Thread outThread = new _Thread_258(inReader);
try
{
errThread.Start();
outThread.Start();
}
catch (InvalidOperationException)
{
}
// wait for the process to finish and check the exit code
try
{
int exitCode = amProc.WaitFor();
Log.Info("AM process exited with value: " + exitCode);
}
catch (Exception e)
{
Sharpen.Runtime.PrintStackTrace(e);
}
finally
{
amCompleted = true;
}
try
{
// make sure that the error thread exits
// on Windows these threads sometimes get stuck and hang the execution
// timeout and join later after destroying the process.
errThread.Join();
outThread.Join();
errReader.Close();
inReader.Close();
}
catch (Exception ie)
{
Log.Info("ShellExecutor: Interrupted while reading the error/out stream", ie);
}
catch (IOException ioe)
{
Log.Warn("Error while closing the error/out stream", ioe);
}
amProc.Destroy();
}
