/// <exception cref="System.Exception"/>
protected override void ServiceInit(Configuration conf)
{
FsPermission storeDirPerms = new FsPermission((short)0x1c0);
Path stateStoreRoot = null;
FileSystem stateStoreFs = null;
bool recoveryEnabled = conf.GetBoolean(YarnConfiguration.NmRecoveryEnabled, YarnConfiguration
.DefaultNmRecoveryEnabled);
if (recoveryEnabled)
{
stateStoreRoot = new Path(conf.Get(YarnConfiguration.NmRecoveryDir), StateStoreRootName
);
stateStoreFs = FileSystem.GetLocal(conf);
}
ICollection <string> auxNames = conf.GetStringCollection(YarnConfiguration.NmAuxServices
);
foreach (string sName in auxNames)
{
try
{
Preconditions.CheckArgument(ValidateAuxServiceName(sName), "The ServiceName: " +
sName + " set in " + YarnConfiguration.NmAuxServices + " is invalid." + "The valid service name should only contain a-zA-Z0-9_ "
+ "and can not start with numbers");
Type sClass = conf.GetClass <AuxiliaryService>(string.Format(YarnConfiguration.NmAuxServiceFmt
, sName), null);
if (null == sClass)
{
throw new RuntimeException("No class defined for " + sName);
}
AuxiliaryService s = ReflectionUtils.NewInstance(sClass, conf);
// TODO better use s.getName()?
if (!sName.Equals(s.GetName()))
{
Log.Warn("The Auxilurary Service named '" + sName + "' in the " + "configuration is for "
+ sClass + " which has " + "a name of '" + s.GetName() + "'. Because these are "
+ "not the same tools trying to send ServiceData and read " + "Service Meta Data may have issues unless the refer to "
+ "the name in the config.");
}
AddService(sName, s);
if (recoveryEnabled)
{
Path storePath = new Path(stateStoreRoot, sName);
stateStoreFs.Mkdirs(storePath, storeDirPerms);
s.SetRecoveryPath(storePath);
}
s.Init(conf);
}
catch (RuntimeException e)
{
Log.Fatal("Failed to initialize " + sName, e);
throw;
}
}
base.ServiceInit(conf);
}
// Obtain services from configuration in init()
protected internal void AddService(string name, AuxiliaryService service)
{
lock (this)
{
Log.Info("Adding auxiliary service " + service.GetName() + ", \"" + name + "\"");
serviceMap[name] = service;
}
}
private void LogWarningWhenAuxServiceThrowExceptions(AuxiliaryService service, AuxServicesEventType
eventType, Exception th)
{
Log.Warn((null == service ? "The auxService is null" : "The auxService name is "
+ service.GetName()) + " and it got an error at event: " + eventType, th);
}
