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From Jonathan Ellis <jbel...@gmail.com>
Subject Re: with proof Re: cassandra goes infinite loop and data lost.....
Date Thu, 21 Jul 2011 02:47:35 GMT
This is not an infinite loop, you can see the column objects being
iterated over are different.

Like I said last time, "I do see that it's saying "N of 2147483647"
which looks like you're
doing slices with a much larger limit than is advisable."

On Wed, Jul 20, 2011 at 9:00 PM, Yan Chunlu <springrider@gmail.com> wrote:
> this time it is another node, the node goes down during repair, and come
> back but never up, I change log level to "DEBUG" and found out it print out
> the following message infinitely
> DEBUG [main] 2011-07-20 20:58:16,286 SliceQueryFilter.java (line 123)
> collecting 0 of 2147483647: 76616c7565:false:6@1311207851757243
> DEBUG [main] 2011-07-20 20:58:16,319 SliceQueryFilter.java (line 123)
> collecting 0 of 2147483647: 76616c7565:false:98@1306722716288857
> DEBUG [main] 2011-07-20 20:58:16,424 SliceQueryFilter.java (line 123)
> collecting 0 of 2147483647: 76616c7565:false:95@1311089980134545
> DEBUG [main] 2011-07-20 20:58:16,611 SliceQueryFilter.java (line 123)
> collecting 0 of 2147483647: 76616c7565:false:85@1311154048866767
> DEBUG [main] 2011-07-20 20:58:16,754 SliceQueryFilter.java (line 123)
> collecting 0 of 2147483647: 76616c7565:false:366@1311207176880564
> DEBUG [main] 2011-07-20 20:58:16,770 SliceQueryFilter.java (line 123)
> collecting 0 of 2147483647: 76616c7565:false:80@1310443605930900
> DEBUG [main] 2011-07-20 20:58:16,816 SliceQueryFilter.java (line 123)
> collecting 0 of 2147483647: 76616c7565:false:486@1311173929610402
> DEBUG [main] 2011-07-20 20:58:16,870 SliceQueryFilter.java (line 123)
> collecting 0 of 2147483647: 76616c7565:false:101@1310818289021118
> DEBUG [main] 2011-07-20 20:58:17,041 SliceQueryFilter.java (line 123)
> collecting 0 of 2147483647: 76616c7565:false:677@1311202595772170
> DEBUG [main] 2011-07-20 20:58:17,047 SliceQueryFilter.java (line 123)
> collecting 0 of 2147483647: 76616c7565:false:374@1311147641237918
>
>
>
> On Thu, Jul 14, 2011 at 1:36 PM, Jonathan Ellis <jbellis@gmail.com> wrote:
>>
>> That says "I'm collecting data to answer requests."
>>
>> I don't see anything here that indicates an infinite loop.
>>
>> I do see that it's saying "N of 2147483647" which looks like you're
>> doing slices with a much larger limit than is advisable (good way to
>> OOM the way you already did).
>>
>> On Wed, Jul 13, 2011 at 8:27 PM, Yan Chunlu <springrider@gmail.com> wrote:
>> > I gave cassandra 8GB heap size and somehow it run out of memory and
>> > crashed.
>> > after I start it, it just runs in to the following infinite loop, the
>> > last
>> > line:
>> > DEBUG [main] 2011-07-13 22:19:00,586 SliceQueryFilter.java (line 123)
>> > collecting 0 of 2147483647: 100zs:false:14@1310168625866434
>> > goes for ever
>> > I have 3 nodes and RF=2, so I am losing data. is that means I am screwed
>> > and
>> > can't get it back?
>> > DEBUG [main] 2011-07-13 22:19:00,585 SliceQueryFilter.java (line 123)
>> > collecting 20 of 2147483647: q74k:false:14@1308886095008943
>> > DEBUG [main] 2011-07-13 22:19:00,585 SliceQueryFilter.java (line 123)
>> > collecting 0 of 2147483647: 10fbu:false:1@1310223075340297
>> > DEBUG [main] 2011-07-13 22:19:00,586 SliceQueryFilter.java (line 123)
>> > collecting 0 of 2147483647: apbg:false:13@1305641597957086
>> > DEBUG [main] 2011-07-13 22:19:00,586 SliceQueryFilter.java (line 123)
>> > collecting 1 of 2147483647: auje:false:13@1305641597957075
>> > DEBUG [main] 2011-07-13 22:19:00,586 SliceQueryFilter.java (line 123)
>> > collecting 2 of 2147483647: ayj8:false:13@1305641597957060
>> > DEBUG [main] 2011-07-13 22:19:00,586 SliceQueryFilter.java (line 123)
>> > collecting 3 of 2147483647: b4fz:false:13@1305641597957096
>> > DEBUG [main] 2011-07-13 22:19:00,586 SliceQueryFilter.java (line 123)
>> > collecting 0 of 2147483647: 100zs:false:14@1310168625866434
>> > DEBUG [main] 2011-07-13 22:19:00,586 SliceQueryFilter.java (line 123)
>> > collecting 1 of 2147483647: 1017f:false:14@1310168680375612
>> > DEBUG [main] 2011-07-13 22:19:00,586 SliceQueryFilter.java (line 123)
>> > collecting 2 of 2147483647: 1018e:false:14@1310168759614715
>> > DEBUG [main] 2011-07-13 22:19:00,587 SliceQueryFilter.java (line 123)
>> > collecting 3 of 2147483647: 101dd:false:14@1310169260225339
>> >
>> > On Thu, Jul 14, 2011 at 11:27 AM, Yan Chunlu <springrider@gmail.com>
>> > wrote:
>> >>
>> >> DEBUG [main] 2011-07-13 22:19:00,586 SliceQueryFilter.java (line 123)
>> >> collecting 0 of 2147483647: 100zs:false:14@1310168625866434
>> >
>> >
>> > --
>> > 闫春路
>> >
>>
>>
>>
>> --
>> Jonathan Ellis
>> Project Chair, Apache Cassandra
>> co-founder of DataStax, the source for professional Cassandra support
>> http://www.datastax.com
>
>
>
> --
> 闫春路
>



-- 
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com

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