Balu Vellanki created FALCON-1595:
-------------------------------------

             Summary: Falcon server loses ability to communicate with HDFS over 
time
                 Key: FALCON-1595
                 URL: https://issues.apache.org/jira/browse/FALCON-1595
             Project: Falcon
          Issue Type: Bug
    Affects Versions: 0.8
            Reporter: Balu Vellanki
            Assignee: Balu Vellanki


In a kerberos secured cluster where the Kerberos ticket validity is one day, 
Falcon server eventually lost the ability to read and write to and from HDFS. 
In the logs we saw typical Kerberos-related errors like "GSSException: No valid 
credentials provided (Mechanism level: Failed to find any Kerberos tgt)". 

{code}
2015-10-28 00:04:59,517 INFO  - [LaterunHandler:] ~ Creating FS impersonating 
user testUser (HadoopClientFactory:197)
2015-10-28 00:04:59,519 WARN  - [LaterunHandler:] ~ Exception encountered while 
connecting to the server : javax.security.sasl.SaslException: GSS initiate 
failed [Caused by GSSException: No valid credentials provided (Mechanism level: 
Failed to find any Kerberos tgt)] (Client:680)
2015-10-28 00:04:59,520 WARN  - [LaterunHandler:] ~ Late Re-run failed for 
instance sample-process:2015-10-28T03:58Z after 420000 
(AbstractRerunConsumer:84)
java.io.IOException: Failed on local exception: java.io.IOException: 
javax.security.sasl.SaslException: GSS initiate failed [Caused by GSSException: 
No valid credentials provided (Mechanism level: Failed to find any Kerberos 
tgt)]; Host Details : local host is: "sample.host.com/127.0.0.1"; destination 
host is: "sample.host.com":8020; 
        at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:773)
        at org.apache.hadoop.ipc.Client.call(Client.java:1431)
        at org.apache.hadoop.ipc.Client.call(Client.java:1358)
        at 
org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:229)
        at com.sun.proxy.$Proxy22.getFileInfo(Unknown Source)
        at 
org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.getFileInfo(ClientNamenodeProtocolTranslatorPB.java:771)
        at sun.reflect.GeneratedMethodAccessor19.invoke(Unknown Source)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:497)
        at 
org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:187)
        at 
org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:102)
        at com.sun.proxy.$Proxy23.getFileInfo(Unknown Source)
        at org.apache.hadoop.hdfs.DFSClient.getFileInfo(DFSClient.java:2116)
        at 
org.apache.hadoop.hdfs.DistributedFileSystem$22.doCall(DistributedFileSystem.java:1305)
        at 
org.apache.hadoop.hdfs.DistributedFileSystem$22.doCall(DistributedFileSystem.java:1301)
        at 
org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)
        at 
org.apache.hadoop.hdfs.DistributedFileSystem.getFileStatus(DistributedFileSystem.java:1301)
        at org.apache.hadoop.fs.FileSystem.exists(FileSystem.java:1424)
        at 
org.apache.falcon.rerun.handler.LateRerunConsumer.detectLate(LateRerunConsumer.java:108)
        at 
org.apache.falcon.rerun.handler.LateRerunConsumer.handleRerun(LateRerunConsumer.java:67)
        at 
org.apache.falcon.rerun.handler.LateRerunConsumer.handleRerun(LateRerunConsumer.java:47)
        at 
org.apache.falcon.rerun.handler.AbstractRerunConsumer.run(AbstractRerunConsumer.java:73)
        at java.lang.Thread.run(Thread.java:745)
Caused by: java.io.IOException: javax.security.sasl.SaslException: GSS initiate 
failed [Caused by GSSException: No valid credentials provided (Mechanism level: 
Failed to find any Kerberos tgt)]
        at org.apache.hadoop.ipc.Client$Connection$1.run(Client.java:685)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:422)
        at 
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657)
        at 
org.apache.hadoop.ipc.Client$Connection.handleSaslConnectionFailure(Client.java:648)
        at 
org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:735)
        at org.apache.hadoop.ipc.Client$Connection.access$2800(Client.java:373)
        at org.apache.hadoop.ipc.Client.getConnection(Client.java:1493)
        at org.apache.hadoop.ipc.Client.call(Client.java:1397)
{code}



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