[Mono-dev] Stackoverflow exception while processing a linq query

[Rodrigo Kumpera]

Could you please file a bug report?


On Sat, Mar 2, 2013 at 2:37 PM, Vladimir Dimitrov
<vlad.dimitrov at gmail.com>wrote:

> Recently I received a strange error on one of our servers which run mono
> 2.10.8.1 on Ubuntu 12.4:
>
> System.AggregateException: One or more errors occured --->
> System.StackOverflowException: The requested operation caused a stack
> overflow.
>   at System.Collections.Concurrent.**SplitOrderedList`2[System.**
> String,System.Collections.**Generic.KeyValuePair`2[System.**
> String,System.Collections.**Generic.IEnumerable`1[**Warehouse.Sync.Common.
> **ChangeItem]]].GetParent (UInt32 v) [0x00000] in <filename unknown>:0
>   at System.Collections.Concurrent.**SplitOrderedList`2[System.**
> String,System.Collections.**Generic.KeyValuePair`2[System.**
> String,System.Collections.**Generic.IEnumerable`1[**Warehouse.Sync.Common.
> **ChangeItem]]].InitializeBucket (UInt32 b) [0x00000] in <filename
> unknown>:0
>   at System.Collections.Concurrent.**SplitOrderedList`2[System.**
> String,System.Collections.**Generic.KeyValuePair`2[System.**
> String,System.Collections.**Generic.IEnumerable`1[**Warehouse.Sync.Common.
> **ChangeItem]]].InitializeBucket (UInt32 b) [0x00000] in <filename
> unknown>:0
>   at System.Collections.Concurrent.**SplitOrderedList`2[System.**
> String,System.Collections.**Generic.KeyValuePair`2[System.**
> String,System.Collections.**Generic.IEnumerable`1[**Warehouse.Sync.Common.
> **ChangeItem]]].InitializeBucket (UInt32 b) [0x00000] in <filename
> unknown>:0
>
> This continued in the logs for several megabytes. Looking at the code (
> https://github.com/mosa/Mono-**Class-Libraries/blob/master/**
> mcs/class/corlib/System.**Collections.Concurrent/**SplitOrderedList.cs<https://github.com/mosa/Mono-Class-Libraries/blob/master/mcs/class/corlib/System.Collections.Concurrent/SplitOrderedList.cs>)
> it looks perfectly normal to happen.
>
> Looks like if InitializeBucket receives 0 then GetParrent will return 0.
> GetBucket can return null too if list it checks in is empty and then the
> whole thing gets into infinite recursion... Any idea on how this situation
> happens/can be avoided and if anybody else encountered a similar problem?
>
> Thanks,
>  Vladimir Dimitrov
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