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From J T <jt4websi...@googlemail.com>
Subject Re: Null Pointer Exception / Secondary Indices
Date Tue, 12 Oct 2010 06:50:18 GMT
Hi,

Looks like I was premature in my response.

I had cause today to wipe my datastore and restart cassandra and reload the
.yaml containing the schema definition.

After doing a restart of my app which essentially inserted into a CF with a
2ndary idx and then queried that CF I was left with log files full of the
following.

DEBUG [ReadStage:1] 2010-10-12 07:29:26,849 SliceQueryFilter.java (line 122)
collecting 0 of 1: null:false:0@1286840713

DEBUG [ReadStage:1] 2010-10-12 07:29:26,850 SliceQueryFilter.java (line 122)
collecting 0 of 1: null:false:0@1286840713

DEBUG [ReadStage:1] 2010-10-12 07:29:26,851 SliceQueryFilter.java (line 122)
collecting 0 of 1: null:false:0@1286840713

DEBUG [ReadStage:1] 2010-10-12 07:29:26,852 SliceQueryFilter.java (line 122)
collecting 0 of 1: null:false:0@1286840713

DEBUG [ReadStage:3] 2010-10-12 07:29:26,798 SliceQueryFilter.java (line 122)
collecting 0 of 1: null:false:0@1286840713

DEBUG [ReadStage:1] 2010-10-12 07:29:26,853 SliceQueryFilter.java (line 122)
collecting 0 of 1: null:false:0@1286840713

DEBUG [ReadStage:3] 2010-10-12 07:29:26,854 SliceQueryFilter.java (line 122)
collecting 0 of 1: null:false:0@1286840713

DEBUG [ReadStage:1] 2010-10-12 07:29:26,854 SliceQueryFilter.java (line 122)
collecting 0 of 1: null:false:0@1286840713

DEBUG [ReadStage:3] 2010-10-12 07:29:26,855 SliceQueryFilter.java (line 122)
collecting 0 of 1: null:false:0@1286840713

DEBUG [ReadStage:1] 2010-10-12 07:29:26,855 SliceQueryFilter.java (line 122)
collecting 0 of 1: null:false:0@1286840713

DEBUG [ReadStage:3] 2010-10-12 07:29:26,856 SliceQueryFilter.java (line 122)
collecting 0 of 1: null:false:0@1286840713

DEBUG [ReadStage:1] 2010-10-12 07:29:26,856 SliceQueryFilter.java (line 122)
collecting 0 of 1: null:false:0@1286840713

DEBUG [ReadStage:3] 2010-10-12 07:29:26,857 SliceQueryFilter.java (line 122)
collecting 0 of 1: null:false:0@1286840713

DEBUG [ReadStage:3] 2010-10-12 07:29:26,858 SliceQueryFilter.java (line 122)
collecting 0 of 1: null:false:0@1286840713

DEBUG [ReadStage:3] 2010-10-12 07:29:26,859 SliceQueryFilter.java (line 122)
collecting 0 of 1: null:false:0@1286840713


This resulted in timeouts in my app.


Jason

On Wed, Oct 6, 2010 at 7:11 PM, J T <jt4websites@googlemail.com> wrote:

> Hi,
>
> On a first pass, that patch seems to have solved the problem.
> I'll be testing that functionality repeatedly in the next day or so I'll
> let you know how it fairs.
>
> Thanks
>
> Jason
>
>
> On Wed, Oct 6, 2010 at 4:06 PM, Stu Hood <stu.hood@rackspace.com> wrote:
>
>> Hey JT,
>>
>> I believe this issue should be fixed by CASSANDRA-1571... if you're able
>> to test that patch, it would be very helpful.
>>
>> Thanks,
>> Stu
>>
>> -----Original Message-----
>> From: "J T" <jt4websites@googlemail.com>
>> Sent: Tuesday, October 5, 2010 9:50pm
>> To: cassandra-user@incubator.apache.org
>> Subject: Null Pointer Exception / Secondary Indices
>>
>> Hi,
>>
>> I've been battling against some errors that only seem to crop up when I'm
>> messing around with secondary indices in 0.7-beta2.
>>
>> Namely I seem to get errors like this start to happen, after I 'delete' a
>> row in a CF that has a couple of secondary indices on it and then at some
>> point later try to query for any rows from that CF.
>> Usually I don;t get the Null pointer exception below, instead what often
>> happens is that the SliceQueryFilter.java line before it, repeats itself
>> forever bever stopping until I kill the server
>>
>> On this occasion I got a null pointer exception as well. This is on trunk
>> as
>> of tonight (but I was getting it over the weekend as well).
>>
>> DEBUG [pool-1-thread-149] 2010-10-06 03:43:15,436 ClientState.java (line
>> 102) logged in: #<User allow_all groups=[]>
>> DEBUG [pool-1-thread-99] 2010-10-06 03:43:15,444 CassandraServer.java
>> (line
>> 536) scan
>> DEBUG [pool-1-thread-99] 2010-10-06 03:43:15,444 StorageProxy.java (line
>> 571) computing restricted ranges for query [0,0]
>> DEBUG [pool-1-thread-99] 2010-10-06 03:43:15,445 StorageProxy.java (line
>> 583) Adding to restricted ranges
>> (91870423363853801063842423182856312085,0]
>> for
>>
>> (91870423363853801063842423182856312085,91870423363853801063842423182856312085]
>> DEBUG [pool-1-thread-99] 2010-10-06 03:43:15,446 StorageProxy.java (line
>> 583) Adding to restricted ranges
>> (0,91870423363853801063842423182856312085]
>> for
>>
>> (91870423363853801063842423182856312085,91870423363853801063842423182856312085]
>> DEBUG [pool-1-thread-99] 2010-10-06 03:43:15,447 StorageProxy.java (line
>> 617) Sorted ranges are [(0,91870423363853801063842423182856312085],
>> (91870423363853801063842423182856312085,0]]
>> DEBUG [pool-1-thread-99] 2010-10-06 03:43:15,447 StorageProxy.java (line
>> 680) scan ranges are
>>
>> (0,91870423363853801063842423182856312085],(91870423363853801063842423182856312085,0]
>> DEBUG [pool-1-thread-99] 2010-10-06 03:43:15,448 StorageProxy.java (line
>> 700) reading org.apache.cassandra.db.IndexScanCommand@1422265 from
>> 1268@localhost/127.0.0.1
>> *DEBUG [ReadStage:24] 2010-10-06 03:43:15,450 SliceQueryFilter.java (line
>> 122) collecting 0 of 1: null:false:0@1286332576*
>> ERROR [ReadStage:24] 2010-10-06 03:43:15,451
>> DebuggableThreadPoolExecutor.java (line 103) Error in ThreadPoolExecutor
>> java.lang.RuntimeException: java.lang.NullPointerException
>> at
>>
>> org.apache.cassandra.service.IndexScanVerbHandler.doVerb(IndexScanVerbHandler.java:50)
>> at
>>
>> org.apache.cassandra.net.MessageDeliveryTask.run(MessageDeliveryTask.java:50)
>> at
>>
>> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
>> at
>>
>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
>> at java.lang.Thread.run(Thread.java:636)
>> Caused by: java.lang.NullPointerException
>> at
>>
>> org.apache.cassandra.db.ColumnFamilyStore.satisfies(ColumnFamilyStore.java:1297)
>> at
>>
>> org.apache.cassandra.db.ColumnFamilyStore.scan(ColumnFamilyStore.java:1245)
>> at
>>
>> org.apache.cassandra.service.IndexScanVerbHandler.doVerb(IndexScanVerbHandler.java:41)
>> ... 4 more
>> ERROR [ReadStage:24] 2010-10-06 03:43:15,453 AbstractCassandraDaemon.java
>> (line 88) Fatal exception in thread Thread[ReadStage:24,5,main]
>> java.lang.RuntimeException: java.lang.NullPointerException
>> at
>>
>> org.apache.cassandra.service.IndexScanVerbHandler.doVerb(IndexScanVerbHandler.java:50)
>> at
>>
>> org.apache.cassandra.net.MessageDeliveryTask.run(MessageDeliveryTask.java:50)
>> at
>>
>> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
>> at
>>
>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
>> at java.lang.Thread.run(Thread.java:636)
>> Caused by: java.lang.NullPointerException
>> at
>>
>> org.apache.cassandra.db.ColumnFamilyStore.satisfies(ColumnFamilyStore.java:1297)
>> at
>>
>> org.apache.cassandra.db.ColumnFamilyStore.scan(ColumnFamilyStore.java:1245)
>> at
>>
>> org.apache.cassandra.service.IndexScanVerbHandler.doVerb(IndexScanVerbHandler.java:41)
>> ... 4 more
>>
>>
>>
>

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