LevelDB ActiveMQ are there restrictions ?

[sekaijin <je...@sap.aphp.fr>]

HI,

I try to work with ActiveMQ 5.13.4 LevelDB on HP-UX

There appears to have a compatibility problem.
when calling the org.iq80.leveldb.impl.DbImpl.compactMemTableInternal()
method
He made a call to
org.iq80.snappy.Snappy.compress 
org.iq80.snappy.UnsafeMemory.loadInt
sun.misc.Unsafe.getInt
which generates a core dump

I saw a question on this subject had been raised.
I wanted to know if the test on HP-UX were made. and if there are
restrictions known to use LevelDB.

thank
A+JYT



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Re: LevelDB ActiveMQ are there restrictions ?

[Tim Bain <tb...@alumni.duke.edu>]

Your suggestion of a JIRA bug report to track the need to update Snappy
sounds like a good one; can you please submit it so this issue isn't lost?

On Aug 2, 2016 3:03 PM, "sekaijin" <je...@sap.aphp.fr> wrote:

> I answer me
>
> It seems that there is actually a bug in the implementation of LevelDB,
> more precisely in snappy. this library is used by LevelDB for low-level
> operations such as buffer handling, and compression.
>
> Hazelcast the project referenced a similar problem and has introduced an
> indicator to use or disable: unsafe.mode.
> https://github.com/hazelcast/hazelcast/issues/5518
>
> https://github.com/hazelcast/hazelcast/blob/master/hazelcast/src/main/java/com/hazelcast/nio/UnsafeHelper.java#L96
>
> the snappy project itself has opened a bug on it.
> https://github.com/dain/snappy/issues/24
>
> I think we should put a warning in the LevelDB-store page, indicating that
> LevelDB can not be used on HP-UX
> and perhaps open an issue to keep track of we will change snappy version of
> once the bug will be fixed.
>
>
> A+JYT
>
>
>
>
>
> --
> View this message in context:
> http://activemq.2283324.n4.nabble.com/LevelDB-ActiveMQ-are-there-restrictions-tp4714969p4714974.html
> Sent from the ActiveMQ - User mailing list archive at Nabble.com.
>

Re: LevelDB ActiveMQ are there restrictions ?

[sekaijin <je...@sap.aphp.fr>]

I answer me

It seems that there is actually a bug in the implementation of LevelDB,
more precisely in snappy. this library is used by LevelDB for low-level
operations such as buffer handling, and compression.

Hazelcast the project referenced a similar problem and has introduced an
indicator to use or disable: unsafe.mode.
https://github.com/hazelcast/hazelcast/issues/5518
https://github.com/hazelcast/hazelcast/blob/master/hazelcast/src/main/java/com/hazelcast/nio/UnsafeHelper.java#L96

the snappy project itself has opened a bug on it.
https://github.com/dain/snappy/issues/24

I think we should put a warning in the LevelDB-store page, indicating that
LevelDB can not be used on HP-UX
and perhaps open an issue to keep track of we will change snappy version of
once the bug will be fixed.


A+JYT





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