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From "Andrew Wong (Jira)" <j...@apache.org>
Subject [jira] [Commented] (RANGER-2899) Ranger Kudu plugin seems to hang when authorizing requests in certain environments
Date Wed, 08 Jul 2020 05:10:00 GMT

    [ https://issues.apache.org/jira/browse/RANGER-2899?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17153236#comment-17153236
] 

Andrew Wong commented on RANGER-2899:
-------------------------------------

[~abhayk] I rebuilt our test with a policy poll interval of 30s and it resulted in the same
result, with seemingly the same [^jstack]
{code:java}
"policyDownloadTimer" #14 daemon prio=5 os_prio=0 tid=0x00007f5d7c992800 nid=0x4d7cf in Object.wait()
[0x00007f5d28601000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
	at java.lang.Object.wait(Native Method)
	- waiting on <0x00000006c000c288> (a java.util.TaskQueue)
	at java.util.TimerThread.mainLoop(Timer.java:552)
	- locked <0x00000006c000c288> (a java.util.TaskQueue)
	at java.util.TimerThread.run(Timer.java:505)

"PolicyRefresher(serviceName=kudu)-12" #12 daemon prio=5 os_prio=0 tid=0x00007f5d7c988000
nid=0x4d7ce waiting on condition [0x00007f5d28702000]
   java.lang.Thread.State: WAITING (parking)
	at sun.misc.Unsafe.park(Native Method)
	- parking to wait for  <0x00000006c000c4a0> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
	at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
	at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
	at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
	at org.apache.ranger.plugin.util.PolicyRefresher.run(PolicyRefresher.java:206)
{code}

> Ranger Kudu plugin seems to hang when authorizing requests in certain environments
> ----------------------------------------------------------------------------------
>
>                 Key: RANGER-2899
>                 URL: https://issues.apache.org/jira/browse/RANGER-2899
>             Project: Ranger
>          Issue Type: Bug
>          Components: plugins
>    Affects Versions: 2.1.0
>            Reporter: Andrew Wong
>            Priority: Major
>         Attachments: jstack, kudu-3154_jstacks.txt
>
>
> Kudu's authorization provider is a Java process that communicates with the Kudu master
processes with IPC going over a pipe. The Java process enqueues requests to be authorized
by a ["kudu"-typed RangerBasePlugin|https://github.com/apache/kudu/blob/master/java/kudu-subprocess/src/main/java/org/apache/kudu/subprocess/ranger/authorization/RangerKuduAuthorizer.java].
> In some of our pre-commit tests that run on Ubuntu 14.04, the plugin appears to hang,
periodically refreshing privileges (we've seen the issue with a refresh interval of 200ms
and 500ms) until the request eventually times out on the Kudu side:
> {code:java}
> 2020-07-03 09:21:25.793 [DEBUG - main] (PolicyRefresher.java:154) Scheduled policyDownloadRefresher
to download policies every 500 milliseconds
> 2020-07-03 09:21:25.794 [INFO - main] (RangerKuduAuthorizer.java:92) Finished Ranger
Kudu plugin initialization
> 2020-07-03 09:21:25.814 [DEBUG - pool-3-thread-1] (QueueUtil.java:40) Message being taken
from the queue
> 2020-07-03 09:21:25.829 [DEBUG - pool-2-thread-1] (QueueUtil.java:58) Message being put
onto the queue
> 2020-07-03 09:21:25.830 [DEBUG - pool-3-thread-2] (QueueUtil.java:40) Message being taken
from the queue
> 2020-07-03 09:21:25.834 [DEBUG - pool-3-thread-3] (QueueUtil.java:40) Message being taken
from the queue
> 2020-07-03 09:21:25.838 [DEBUG - pool-3-thread-1] (QueueUtil.java:44) Message: org.apache.kudu.subprocess.InboundRequest@6a0874e7
has been taken from the queue
> 2020-07-03 09:21:25.841 [DEBUG - pool-4-thread-1] (QueueUtil.java:40) Message being taken
from the queue
> 2020-07-03 09:21:25.845 [DEBUG - pool-2-thread-1] (QueueUtil.java:62) Message: org.apache.kudu.subprocess.InboundRequest@6a0874e7
has been put on the queue
> 2020-07-03 09:21:25.866 [DEBUG - pool-3-thread-1] (ProtocolHandler.java:53) Unpacking
request
> 2020-07-03 09:21:25.869 [DEBUG - pool-3-thread-1] (ProtocolHandler.java:60) Executing
request
> 2020-07-03 09:21:26.012 [DEBUG - pool-3-thread-1] (RangerProtocolHandler.java:53) Executing
request
> 2020-07-03 09:21:26.021 [DEBUG - pool-3-thread-1] (Groups.java:312) GroupCacheLoader
- load.
> 2020-07-03 09:21:26.037 [DEBUG - pool-3-thread-1] (UserGroupInformation.java:1737) Failed
to get groups for user user by java.io.IOException: No groups found for user user
> 2020-07-03 09:21:26.040 [DEBUG - pool-3-thread-1] (RangerKuduAuthorizer.java:125) calling
plugin
> 2020-07-03 09:21:26.294 [DEBUG - PolicyRefresher(serviceName=kudu)-12] (PolicyRefresher.java:489)
==> PolicyRefresher(serviceName=kudu).loadRoles()
> 2020-07-03 09:21:26.294 [DEBUG - PolicyRefresher(serviceName=kudu)-12] (RangerRolesProvider.java:109)
==> RangerRolesProvider(serviceName= kudu serviceType= kudu).loadUserGroupRoles()
> 2020-07-03 09:21:26.294 [DEBUG - PolicyRefresher(serviceName=kudu)-12] (RangerRolesProvider.java:118)
In-Use memory: 14500632, Free memory:223526120
> 2020-07-03 09:21:26.294 [DEBUG - PolicyRefresher(serviceName=kudu)-12] (RangerRolesProvider.java:171)
==> RangerRolesProvider(serviceName=kudu).loadUserGroupRolesFromAdmin()
> 2020-07-03 09:21:26.294 [DEBUG - PolicyRefresher(serviceName=kudu)-12] (RangerAdminRESTClient.java:204)
==> RangerAdminRESTClient.getRolesIfUpdated(-1, 1593768085212)
> 2020-07-03 09:21:26.295 [DEBUG - PolicyRefresher(serviceName=kudu)-12] (RangerAdminRESTClient.java:238)
Checking Roles updated as user : slave (auth:SIMPLE)
> Jul 03, 2020 9:21:26 AM com.sun.jersey.api.client.ClientResponse getEntity
> SEVERE: A message body reader for Java class java.lang.String, and Java type class java.lang.String,
and MIME media type application/octet-stream was not found
> Jul 03, 2020 9:21:26 AM com.sun.jersey.api.client.ClientResponse getEntity
> SEVERE: The registered message body readers compatible with the MIME media type are:
> */* ->
>   com.sun.jersey.json.impl.provider.entity.JSONJAXBElementProvider$General
>   com.sun.jersey.json.impl.provider.entity.JSONArrayProvider$General
>   com.sun.jersey.json.impl.provider.entity.JSONObjectProvider$General 
> ... the rest of the logs seem to be Ranger refreshing policies until Kudu times out{code}
> The Ranger server is running on [commit f37f5407eee8d2627a4306a25938b151f8e2ba31|https://github.com/apache/ranger/commits/f37f5407eee8d2627a4306a25938b151f8e2ba31] and
the Ranger plugin version is 2.0.0. More logs are attached in KUDU-3154.
> Are there known issues with the plugin when refreshing the privilege interval at high
frequencies that can cause such hanging behavior?



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