public virtual int Call()
{
// dispatcher not typed
ContainerLaunchContext launchContext = container.GetLaunchContext();
IDictionary <Path, IList <string> > localResources = null;
ContainerId containerID = container.GetContainerId();
string containerIdStr = ConverterUtils.ToString(containerID);
IList <string> command = launchContext.GetCommands();
int ret = -1;
// CONTAINER_KILLED_ON_REQUEST should not be missed if the container
// is already at KILLING
if (container.GetContainerState() == ContainerState.Killing)
{
dispatcher.GetEventHandler().Handle(new ContainerExitEvent(containerID, ContainerEventType
.ContainerKilledOnRequest, Shell.Windows ? ContainerExecutor.ExitCode.ForceKilled
.GetExitCode() : ContainerExecutor.ExitCode.Terminated.GetExitCode(), "Container terminated before launch."
));
return(0);
}
try
{
localResources = container.GetLocalizedResources();
if (localResources == null)
{
throw RPCUtil.GetRemoteException("Unable to get local resources when Container "
+ containerID + " is at " + container.GetContainerState());
}
string user = container.GetUser();
// /////////////////////////// Variable expansion
// Before the container script gets written out.
IList <string> newCmds = new AList <string>(command.Count);
string appIdStr = app.GetAppId().ToString();
string relativeContainerLogDir = Org.Apache.Hadoop.Yarn.Server.Nodemanager.Containermanager.Launcher.ContainerLaunch
.GetRelativeContainerLogDir(appIdStr, containerIdStr);
Path containerLogDir = dirsHandler.GetLogPathForWrite(relativeContainerLogDir, false
);
foreach (string str in command)
{
// TODO: Should we instead work via symlinks without this grammar?
newCmds.AddItem(ExpandEnvironment(str, containerLogDir));
}
launchContext.SetCommands(newCmds);
IDictionary <string, string> environment = launchContext.GetEnvironment();
// Make a copy of env to iterate & do variable expansion
foreach (KeyValuePair <string, string> entry in environment)
{
string value = entry.Value;
value = ExpandEnvironment(value, containerLogDir);
entry.SetValue(value);
}
// /////////////////////////// End of variable expansion
FileContext lfs = FileContext.GetLocalFSFileContext();
Path nmPrivateContainerScriptPath = dirsHandler.GetLocalPathForWrite(GetContainerPrivateDir
(appIdStr, containerIdStr) + Path.Separator + ContainerScript);
Path nmPrivateTokensPath = dirsHandler.GetLocalPathForWrite(GetContainerPrivateDir
(appIdStr, containerIdStr) + Path.Separator + string.Format(ContainerLocalizer.TokenFileNameFmt
, containerIdStr));
Path nmPrivateClasspathJarDir = dirsHandler.GetLocalPathForWrite(GetContainerPrivateDir
(appIdStr, containerIdStr));
DataOutputStream containerScriptOutStream = null;
DataOutputStream tokensOutStream = null;
// Select the working directory for the container
Path containerWorkDir = dirsHandler.GetLocalPathForWrite(ContainerLocalizer.Usercache
+ Path.Separator + user + Path.Separator + ContainerLocalizer.Appcache + Path.Separator
+ appIdStr + Path.Separator + containerIdStr, LocalDirAllocator.SizeUnknown, false
);
string pidFileSubpath = GetPidFileSubpath(appIdStr, containerIdStr);
// pid file should be in nm private dir so that it is not
// accessible by users
pidFilePath = dirsHandler.GetLocalPathForWrite(pidFileSubpath);
IList <string> localDirs = dirsHandler.GetLocalDirs();
IList <string> logDirs = dirsHandler.GetLogDirs();
IList <string> containerLogDirs = new AList <string>();
foreach (string logDir in logDirs)
{
containerLogDirs.AddItem(logDir + Path.Separator + relativeContainerLogDir);
}
if (!dirsHandler.AreDisksHealthy())
{
ret = ContainerExitStatus.DisksFailed;
throw new IOException("Most of the disks failed. " + dirsHandler.GetDisksHealthReport
(false));
}
try
{
// /////////// Write out the container-script in the nmPrivate space.
IList <Path> appDirs = new AList <Path>(localDirs.Count);
foreach (string localDir in localDirs)
{
Path usersdir = new Path(localDir, ContainerLocalizer.Usercache);
Path userdir = new Path(usersdir, user);
Path appsdir = new Path(userdir, ContainerLocalizer.Appcache);
appDirs.AddItem(new Path(appsdir, appIdStr));
}
containerScriptOutStream = lfs.Create(nmPrivateContainerScriptPath, EnumSet.Of(CreateFlag
.Create, CreateFlag.Overwrite));
// Set the token location too.
environment[ApplicationConstants.ContainerTokenFileEnvName] = new Path(containerWorkDir
, FinalContainerTokensFile).ToUri().GetPath();
// Sanitize the container's environment
SanitizeEnv(environment, containerWorkDir, appDirs, containerLogDirs, localResources
, nmPrivateClasspathJarDir);
// Write out the environment
exec.WriteLaunchEnv(containerScriptOutStream, environment, localResources, launchContext
.GetCommands());
// /////////// End of writing out container-script
// /////////// Write out the container-tokens in the nmPrivate space.
tokensOutStream = lfs.Create(nmPrivateTokensPath, EnumSet.Of(CreateFlag.Create, CreateFlag
.Overwrite));
Credentials creds = container.GetCredentials();
creds.WriteTokenStorageToStream(tokensOutStream);
}
finally
{
// /////////// End of writing out container-tokens
IOUtils.Cleanup(Log, containerScriptOutStream, tokensOutStream);
}
// LaunchContainer is a blocking call. We are here almost means the
// container is launched, so send out the event.
dispatcher.GetEventHandler().Handle(new ContainerEvent(containerID, ContainerEventType
.ContainerLaunched));
context.GetNMStateStore().StoreContainerLaunched(containerID);
// Check if the container is signalled to be killed.
if (!shouldLaunchContainer.CompareAndSet(false, true))
{
Log.Info("Container " + containerIdStr + " not launched as " + "cleanup already called"
);
ret = ContainerExecutor.ExitCode.Terminated.GetExitCode();
}
else
{
exec.ActivateContainer(containerID, pidFilePath);
ret = exec.LaunchContainer(container, nmPrivateContainerScriptPath, nmPrivateTokensPath
, user, appIdStr, containerWorkDir, localDirs, logDirs);
}
}
catch (Exception e)
{
Log.Warn("Failed to launch container.", e);
dispatcher.GetEventHandler().Handle(new ContainerExitEvent(containerID, ContainerEventType
.ContainerExitedWithFailure, ret, e.Message));
return(ret);
}
finally
{
completed.Set(true);
exec.DeactivateContainer(containerID);
try
{
context.GetNMStateStore().StoreContainerCompleted(containerID, ret);
}
catch (IOException)
{
Log.Error("Unable to set exit code for container " + containerID);
}
}
if (Log.IsDebugEnabled())
{
Log.Debug("Container " + containerIdStr + " completed with exit code " + ret);
}
if (ret == ContainerExecutor.ExitCode.ForceKilled.GetExitCode() || ret == ContainerExecutor.ExitCode
.Terminated.GetExitCode())
{
// If the process was killed, Send container_cleanedup_after_kill and
// just break out of this method.
dispatcher.GetEventHandler().Handle(new ContainerExitEvent(containerID, ContainerEventType
.ContainerKilledOnRequest, ret, "Container exited with a non-zero exit code " +
ret));
return(ret);
}
if (ret != 0)
{
Log.Warn("Container exited with a non-zero exit code " + ret);
this.dispatcher.GetEventHandler().Handle(new ContainerExitEvent(containerID, ContainerEventType
.ContainerExitedWithFailure, ret, "Container exited with a non-zero exit code "
+ ret));
return(ret);
}
Log.Info("Container " + containerIdStr + " succeeded ");
dispatcher.GetEventHandler().Handle(new ContainerEvent(containerID, ContainerEventType
.ContainerExitedWithSuccess));
return(0);
}