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Date: Thu, 26 Oct 2017 16:17:00 +0000 (UTC)
From: "Daryn Sharp (JIRA)" <jira@apache.org>
To: common-issues@hadoop.apache.org
Message-ID: <JIRA.13112011.1508948748000.69429.1509034620167@Atlassian.JIRA>
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Subject: [jira] [Commented] (HADOOP-14982) Clients using
 FailoverOnNetworkExceptionRetry can go into a loop if they're used without
 authenticating with kerberos in HA env
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archived-at: Thu, 26 Oct 2017 16:17:05 -0000


    [ https://issues.apache.org/jira/browse/HADOOP-14982?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16220705#comment-16220705 ] 

Daryn Sharp commented on HADOOP-14982:
--------------------------------------

Unnecessary retries on authentication failure has been a general issue (re)introduced around 2.7 or so that I fixed long and haven't had time to re-fix.  The IPC layer itself has already attempted retries for SASL exceptions.  If one bubbles out, it's game over.

Don't make this kerberos specific at all.  Just make SaslException fatal.

> Clients using FailoverOnNetworkExceptionRetry can go into a loop if they're used without authenticating with kerberos in HA env
> -------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-14982
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14982
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: common
>            Reporter: Peter Bacsko
>            Assignee: Peter Bacsko
>         Attachments: HADOOP-14892-001.patch
>
>
> If HA is configured for the Resource Manager in a secure environment, using the mapred client goes into a loop if the user is not authenticated with Kerberos.
> {noformat}
> [root@pb6sec-1 ~]# mapred job -list
> 17/10/25 06:37:43 INFO client.ConfiguredRMFailoverProxyProvider: Failing over to rm36
> 17/10/25 06:37:43 WARN ipc.Client: 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)]
> 17/10/25 06:37:43 INFO retry.RetryInvocationHandler: 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: "host_redacted/IP_redacted"; destination host is: "com.host2.redacted:8032; , while invoking ApplicationClientProtocolPBClientImpl.getApplications over rm36 after 1 failover attempts. Trying to failover after sleeping for 160ms.
> 17/10/25 06:37:43 INFO client.ConfiguredRMFailoverProxyProvider: Failing over to rm25
> 17/10/25 06:37:43 INFO retry.RetryInvocationHandler: java.net.ConnectException: Call From host_redacted/IP_redacted to com.host.redacted:8032 failed on connection exception: java.net.ConnectException: Connection refused; For more details see:  http://wiki.apache.org/hadoop/ConnectionRefused, while invoking ApplicationClientProtocolPBClientImpl.getApplications over rm25 after 2 failover attempts. Trying to failover after sleeping for 582ms.
> 17/10/25 06:37:44 INFO client.ConfiguredRMFailoverProxyProvider: Failing over to rm36
> 17/10/25 06:37:44 WARN ipc.Client: 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)]
> 17/10/25 06:37:44 INFO retry.RetryInvocationHandler: 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: "host_redacted/IP_redacted"; destination host is: "com.host2.redacted:8032; , while invoking ApplicationClientProtocolPBClientImpl.getApplications over rm36 after 3 failover attempts. Trying to failover after sleeping for 977ms.
> 17/10/25 06:37:45 INFO client.ConfiguredRMFailoverProxyProvider: Failing over to rm25
> 17/10/25 06:37:45 INFO retry.RetryInvocationHandler: java.net.ConnectException: Call From host_redacted/IP_redacted to com.host.redacted:8032 failed on connection exception: java.net.ConnectException: Connection refused; For more details see:  http://wiki.apache.org/hadoop/ConnectionRefused, while invoking ApplicationClientProtocolPBClientImpl.getApplications over rm25 after 4 failover attempts. Trying to failover after sleeping for 1667ms.
> 17/10/25 06:37:46 INFO client.ConfiguredRMFailoverProxyProvider: Failing over to rm36
> 17/10/25 06:37:46 WARN ipc.Client: 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)]
> 17/10/25 06:37:46 INFO retry.RetryInvocationHandler: 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: "host_redacted/IP_redacted"; destination host is: "com.host2.redacted:8032; , while invoking ApplicationClientProtocolPBClientImpl.getApplications over rm36 after 5 failover attempts. Trying to failover after sleeping for 2776ms.
> 17/10/25 06:37:49 INFO client.ConfiguredRMFailoverProxyProvider: Failing over to rm25
> 17/10/25 06:37:49 INFO retry.RetryInvocationHandler: java.net.ConnectException: Call From host_redacted/IP_redacted to com.host.redacted:8032 failed on connection exception: java.net.ConnectException: Connection refused; For more details see:  http://wiki.apache.org/hadoop/ConnectionRefused, while invoking ApplicationClientProtocolPBClientImpl.getApplications over rm25 after 6 failover attempts. Trying to failover after sleeping for 1055ms.
> 17/10/25 06:37:50 INFO client.ConfiguredRMFailoverProxyProvider: Failing over to rm36
> 17/10/25 06:37:50 WARN ipc.Client: 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)]
> 17/10/25 06:37:50 INFO retry.RetryInvocationHandler: 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: "host_redacted/IP_redacted"; destination host is: "com.host2.redacted:8032; , while invoking ApplicationClientProtocolPBClientImpl.getApplications over rm36 after 7 failover attempts. Trying to failover after sleeping for 2608ms.
> ...
> {noformat}
> The reason is that the retry handler sees a {{ConnectException}}, then fails over to the inactive RM. This obviously doesn't work, so it comes back to the active and whole process starts again. The RetryHandler should examine if the {{ConnectException}} is actually caused by a {{GSSException}} (and probably check the "No valid credentials provided" message) and if so, it should not perform a failover.


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