/// <exception cref="Org.Apache.Hadoop.Security.Token.SecretManager.InvalidToken"/>
private BlockReader GetBlockReaderLocal()
{
if (Log.IsTraceEnabled())
{
Log.Trace(this + ": trying to construct a BlockReaderLocal " + "for short-circuit reads."
);
}
if (pathInfo == null)
{
pathInfo = clientContext.GetDomainSocketFactory().GetPathInfo(inetSocketAddress,
conf);
}
if (!pathInfo.GetPathState().GetUsableForShortCircuit())
{
PerformanceAdvisory.Log.Debug(this + ": " + pathInfo + " is not " + "usable for short circuit; giving up on BlockReaderLocal."
);
return(null);
}
ShortCircuitCache cache = clientContext.GetShortCircuitCache();
ExtendedBlockId key = new ExtendedBlockId(block.GetBlockId(), block.GetBlockPoolId
());
ShortCircuitReplicaInfo info = cache.FetchOrCreate(key, this);
SecretManager.InvalidToken exc = info.GetInvalidTokenException();
if (exc != null)
{
if (Log.IsTraceEnabled())
{
Log.Trace(this + ": got InvalidToken exception while trying to " + "construct BlockReaderLocal via "
+ pathInfo.GetPath());
}
throw exc;
}
if (info.GetReplica() == null)
{
if (Log.IsTraceEnabled())
{
PerformanceAdvisory.Log.Debug(this + ": failed to get " + "ShortCircuitReplica. Cannot construct "
+ "BlockReaderLocal via " + pathInfo.GetPath());
}
return(null);
}
return(new BlockReaderLocal.Builder(conf).SetFilename(fileName).SetBlock(block).SetStartOffset
(startOffset).SetShortCircuitReplica(info.GetReplica()).SetVerifyChecksum(verifyChecksum
).SetCachingStrategy(cachingStrategy).SetStorageType(storageType).Build());
}
/// <exception cref="Org.Apache.Hadoop.Security.Token.SecretManager.InvalidToken"/>
public override byte[] RetrievePassword(DelegationTokenIdentifier identifier)
{
try
{
// this check introduces inconsistency in the authentication to a
// HA standby NN. non-token auths are allowed into the namespace which
// decides whether to throw a StandbyException. tokens are a bit
// different in that a standby may be behind and thus not yet know
// of all tokens issued by the active NN. the following check does
// not allow ANY token auth, however it should allow known tokens in
namesystem.CheckOperation(NameNode.OperationCategory.Read);
}
catch (StandbyException se)
{
// FIXME: this is a hack to get around changing method signatures by
// tunneling a non-InvalidToken exception as the cause which the
// RPC server will unwrap before returning to the client
SecretManager.InvalidToken wrappedStandby = new SecretManager.InvalidToken("StandbyException"
);
Sharpen.Extensions.InitCause(wrappedStandby, se);
throw wrappedStandby;
}
return(base.RetrievePassword(identifier));
}
public ShortCircuitReplicaInfo(SecretManager.InvalidToken exc)
{
this.replica = null;
this.exc = exc;
}
public ShortCircuitReplicaInfo(ShortCircuitReplica replica)
{
this.replica = replica;
this.exc = null;
}
public ShortCircuitReplicaInfo()
{
this.replica = null;
this.exc = null;
}
