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From "Vishy Kasar (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-8194) Reading from Auth table should not be in the request path
Date Tue, 09 Dec 2014 20:13:13 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-8194?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Vishy Kasar updated CASSANDRA-8194:
-----------------------------------
    Attachment: CacheTest2.java

Jeremiah,

An attempt will be made to update at each refreshAfterWrite interval as long as there are
active requests. Even if some of those refresh attempts fail/time-out, there will be others
attempted as long as there are active requests. Some of those attempts should succeed and
refresh the cache. If there are no active requests, then we do not care if the entry in cache
is stale or not. I have attached a simple CacheTest2.java that illustrates this. 

Let me know if this is still a concern. 

> Reading from Auth table should not be in the request path
> ---------------------------------------------------------
>
>                 Key: CASSANDRA-8194
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8194
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Vishy Kasar
>            Priority: Minor
>             Fix For: 2.0.12, 3.0
>
>         Attachments: 8194-V2.patch, 8194.patch, CacheTest2.java
>
>
> We use PasswordAuthenticator and PasswordAuthorizer. The system_auth has a RF of 10 per
DC over 2 DCs. The permissions_validity_in_ms is 5 minutes. 
> We still have few thousand requests failing each day with the trace below. The reason
for this is read cache request realizing that cached entry has expired and doing a blocking
request to refresh cache. 
> We should have cache refreshed periodically only in the back ground. The user request
should simply look at the cache and not try to refresh it. 
> com.google.common.util.concurrent.UncheckedExecutionException: java.lang.RuntimeException:
org.apache.cassandra.exceptions.ReadTimeoutException: Operation timed out - received only
0 responses.
> 	at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2258)
> 	at com.google.common.cache.LocalCache.get(LocalCache.java:3990)
> 	at com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:3994)
> 	at com.google.common.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:4878)
> 	at org.apache.cassandra.service.ClientState.authorize(ClientState.java:292)
> 	at org.apache.cassandra.service.ClientState.ensureHasPermission(ClientState.java:172)
> 	at org.apache.cassandra.service.ClientState.hasAccess(ClientState.java:165)
> 	at org.apache.cassandra.service.ClientState.hasColumnFamilyAccess(ClientState.java:149)
> 	at org.apache.cassandra.cql3.statements.ModificationStatement.checkAccess(ModificationStatement.java:75)
> 	at org.apache.cassandra.cql3.QueryProcessor.processStatement(QueryProcessor.java:102)
> 	at org.apache.cassandra.cql3.QueryProcessor.process(QueryProcessor.java:113)
> 	at org.apache.cassandra.thrift.CassandraServer.execute_cql3_query(CassandraServer.java:1735)
> 	at org.apache.cassandra.thrift.Cassandra$Processor$execute_cql3_query.getResult(Cassandra.java:4162)
> 	at org.apache.cassandra.thrift.Cassandra$Processor$execute_cql3_query.getResult(Cassandra.java:4150)
> 	at org.apache.thrift.ProcessFunction.process(ProcessFunction.java:32)
> 	at org.apache.thrift.TBaseProcessor.process(TBaseProcessor.java:34)
> 	at org.apache.cassandra.thrift.CustomTThreadPoolServer$WorkerProcess.run(CustomTThreadPoolServer.java:206)
> 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
> 	at java.lang.Thread.run(Thread.java:722)
> Caused by: java.lang.RuntimeException: org.apache.cassandra.exceptions.ReadTimeoutException:
Operation timed out - received only 0 responses.
> 	at org.apache.cassandra.auth.Auth.selectUser(Auth.java:256)
> 	at org.apache.cassandra.auth.Auth.isSuperuser(Auth.java:84)
> 	at org.apache.cassandra.auth.AuthenticatedUser.isSuper(AuthenticatedUser.java:50)
> 	at org.apache.cassandra.auth.CassandraAuthorizer.authorize(CassandraAuthorizer.java:68)
> 	at org.apache.cassandra.service.ClientState$1.load(ClientState.java:278)
> 	at org.apache.cassandra.service.ClientState$1.load(ClientState.java:275)
> 	at com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3589)
> 	at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2374)
> 	at com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2337)
> 	at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2252)
> 	... 19 more
> Caused by: org.apache.cassandra.exceptions.ReadTimeoutException: Operation timed out
- received only 0 responses.
> 	at org.apache.cassandra.service.ReadCallback.get(ReadCallback.java:105)
> 	at org.apache.cassandra.service.StorageProxy.fetchRows(StorageProxy.java:943)
> 	at org.apache.cassandra.service.StorageProxy.read(StorageProxy.java:828)
> 	at org.apache.cassandra.cql3.statements.SelectStatement.execute(SelectStatement.java:140)
> 	at org.apache.cassandra.auth.Auth.selectUser(Auth.java:245)
> 	... 28 more
> ERROR [Thrift:17232] 2014-10-24 05:06:51,004 CustomTThreadPoolServer.java (line 224)
Error occurred during processing of message.
> com.google.common.util.concurrent.UncheckedExecutionException: java.lang.RuntimeException:
org.apache.cassandra.exceptions.ReadTimeoutException: Operation timed out - received only
0 responses.
> 	at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2258)
> 	at com.google.common.cache.LocalCache.get(LocalCache.java:3990)
> 	at com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:3994)
> 	at com.google.common.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:4878)
> 	at org.apache.cassandra.service.ClientState.authorize(ClientState.java:292)
> 	at org.apache.cassandra.service.ClientState.ensureHasPermission(ClientState.java:172)
> 	at org.apache.cassandra.service.ClientState.hasAccess(ClientState.java:165)
> 	at org.apache.cassandra.service.ClientState.hasColumnFamilyAccess(ClientState.java:149)
> 	at org.apache.cassandra.cql3.statements.SelectStatement.checkAccess(SelectStatement.java:116)
> 	at org.apache.cassandra.cql3.QueryProcessor.processStatement(QueryProcessor.java:102)
> 	at org.apache.cassandra.cql3.QueryProcessor.process(QueryProcessor.java:113)
> 	at org.apache.cassandra.thrift.CassandraServer.execute_cql3_query(CassandraServer.java:1735)
> 	at org.apache.cassandra.thrift.Cassandra$Processor$execute_cql3_query.getResult(Cassandra.java:4162)
> 	at org.apache.cassandra.thrift.Cassandra$Processor$execute_cql3_query.getResult(Cassandra.java:4150)
> 	at org.apache.thrift.ProcessFunction.process(ProcessFunction.java:32)
> 	at org.apache.thrift.TBaseProcessor.process(TBaseProcessor.java:34)
> 	at org.apache.cassandra.thrift.CustomTThreadPoolServer$WorkerProcess.run(CustomTThreadPoolServer.java:206)
> 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
> 	at java.lang.Thread.run(Thread.java:722)
> Caused by: java.lang.RuntimeException: org.apache.cassandra.exceptions.ReadTimeoutException:
Operation timed out - received only 0 responses.
> 	at org.apache.cassandra.auth.Auth.selectUser(Auth.java:256)
> 	at org.apache.cassandra.auth.Auth.isSuperuser(Auth.java:84)
> 	at org.apache.cassandra.auth.AuthenticatedUser.isSuper(AuthenticatedUser.java:50)
> 	at org.apache.cassandra.auth.CassandraAuthorizer.authorize(CassandraAuthorizer.java:68)
> 	at org.apache.cassandra.service.ClientState$1.load(ClientState.java:278)
> 	at org.apache.cassandra.service.ClientState$1.load(ClientState.java:275)
> 	at com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3589)
> 	at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2374)
> 	at com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2337)
> 	at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2252)
> 	... 19 more
> Caused by: org.apache.cassandra.exceptions.ReadTimeoutException: Operation timed out
- received only 0 responses.
> 	at org.apache.cassandra.service.ReadCallback.get(ReadCallback.java:105)
> 	at org.apache.cassandra.service.StorageProxy.fetchRows(StorageProxy.java:943)
> 	at org.apache.cassandra.service.StorageProxy.read(StorageProxy.java:828)
> 	at org.apache.cassandra.cql3.statements.SelectStatement.execute(SelectStatement.java:140)
> 	at org.apache.cassandra.auth.Auth.selectUser(Auth.java:245)
> 	... 28 more



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