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From "Xu (Simon) Chen" <xche...@gmail.com>
Subject Re: kerberos auth, getDelegationToken
Date Sat, 06 Jun 2015 20:44:57 GMT
Josh,

Thanks. It makes sense...

I used a KerberosToken, but my program got stuck when running the following:
new ZooKeeperInstance(instance, zookeepers).getConnector(user, krbToken)

It looks like my client is stuck here:
https://github.com/apache/accumulo/blob/master/core/src/main/java/org/apache/accumulo/core/client/impl/ConnectorImpl.java#L70
failing in the receive part of
org.apache.accumulo.core.client.impl.thrift.ClientService.Client.authenticate().

On my tservers, I see the following:

2015-06-06 18:58:19,616 [server.TThreadPoolServer] ERROR: Error
occurred during processing of message.
java.lang.RuntimeException:
org.apache.thrift.transport.TTransportException:
java.net.SocketTimeoutException: Read timed out
        at org.apache.thrift.transport.TSaslServerTransport$Factory.getTransport(TSaslServerTransport.java:219)
        at org.apache.accumulo.core.rpc.UGIAssumingTransportFactory$1.run(UGIAssumingTransportFactory.java:51)
        at org.apache.accumulo.core.rpc.UGIAssumingTransportFactory$1.run(UGIAssumingTransportFactory.java:48)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:356)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1622)
        at org.apache.accumulo.core.rpc.UGIAssumingTransportFactory.getTransport(UGIAssumingTransportFactory.java:48)
        at org.apache.thrift.server.TThreadPoolServer$WorkerProcess.run(TThreadPoolServer.java:208)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at org.apache.accumulo.fate.util.LoggingRunnable.run(LoggingRunnable.java:35)
        at java.lang.Thread.run(Thread.java:745)
Caused by: org.apache.thrift.transport.TTransportException:
java.net.SocketTimeoutException: Read timed out
        at org.apache.thrift.transport.TIOStreamTransport.read(TIOStreamTransport.java:129)
        at org.apache.thrift.transport.TTransport.readAll(TTransport.java:84)
        at org.apache.thrift.transport.TSaslTransport.receiveSaslMessage(TSaslTransport.java:182)
        at org.apache.thrift.transport.TSaslServerTransport.handleSaslStartMessage(TSaslServerTransport.java:125)
        at org.apache.thrift.transport.TSaslTransport.open(TSaslTransport.java:253)
        at org.apache.thrift.transport.TSaslServerTransport.open(TSaslServerTransport.java:41)
        at org.apache.thrift.transport.TSaslServerTransport$Factory.getTransport(TSaslServerTransport.java:216)
        ... 11 more
Caused by: java.net.SocketTimeoutException: Read timed out
        at java.net.SocketInputStream.socketRead0(Native Method)
        at java.net.SocketInputStream.read(SocketInputStream.java:152)
        at java.net.SocketInputStream.read(SocketInputStream.java:122)
        at java.io.BufferedInputStream.read1(BufferedInputStream.java:273)
        at java.io.BufferedInputStream.read(BufferedInputStream.java:334)
        at org.apache.thrift.transport.TIOStreamTransport.read(TIOStreamTransport.java:127)
        ... 17 more

Any ideas why?

Thanks.
-Simon




On Sat, Jun 6, 2015 at 2:19 PM, Josh Elser <josh.elser@gmail.com> wrote:
> Make sure you read the JavaDoc on DelegationToken:
>
> <snip>
> Obtain a delegation token by calling {@link
> SecurityOperations#getDelegationToken(org.apache.accumulo.core.client.admin.DelegationTokenConfig)}
> </snip>
>
> You cannot create a usable DelegationToken as the client itself.
>
> Anyways, DelegationTokens are only relevant in cases where the client
> Kerberos credentials are unavailable. The most common case is running
> MapReduce jobs. If you are just interacting with Accumulo through the Java
> API, the KerberosToken is all you need to use.
>
> The user-manual likely just needs to be updated. I believe the
> DelegationTokenConfig was added after I wrote the initial documentation.
>
>
> Xu (Simon) Chen wrote:
>>
>> Hi folks,
>>
>> The latest kerberos doc seems to indicate that getDelegationToken can be
>> called without any parameters:
>>
>> https://github.com/apache/accumulo/blob/1.7/docs/src/main/asciidoc/chapters/kerberos.txt#L410
>>
>> Yet the source code indicates a DelegationTokenConfig object must be
>> passed in:
>>
>> https://github.com/apache/accumulo/blob/1.7/core/src/main/java/org/apache/accumulo/core/client/admin/SecurityOperations.java#L359
>>
>> Any ideas on how I should construct the DelegationTokenConfig object?
>>
>> For context, I've been trying to get geomesa to work on my accumulo 1.7
>> with kerberos turned on. Right now, the code is somewhat tied to
>> password auth:
>>
>> https://github.com/locationtech/geomesa/blob/rc7_a1.7_h2.5/geomesa-core/src/main/scala/org/locationtech/geomesa/core/data/AccumuloDataStoreFactory.scala#L177
>> My thought is that I should get a KerberosToken first, and then try
>> generate a DelegationToken, which is passed back for later interactions
>> between geomesa and accumulo.
>>
>> Thanks.
>> -Simon

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