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  1. Cassandra
  2. CASSANDRA-8194

Reading from Auth table should not be in the request path

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      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

      Attachments

        1. 8194-V5.txt
          15 kB
          Sam Tunnicliffe
        2. 8194-V4.txt
          6 kB
          Sam Tunnicliffe
        3. 8194-V3.txt
          5 kB
          Sam Tunnicliffe
        4. CacheTest2.java
          2 kB
          Vishy Kasar
        5. 8194-V2.patch
          4 kB
          Vishy Kasar
        6. 8194.patch
          5 kB
          Vishy Kasar

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              samt Sam Tunnicliffe
              vkasar Vishy Kasar
              Sam Tunnicliffe
              Aleksey Yeschenko
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                Updated:
                Resolved: