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From Denis <de...@camfex.cz>
Subject Re: Offline tables on adding a tserver (Accumulo 1.6 regression?)
Date Tue, 13 Jan 2015 16:48:09 GMT
>  If you jstack your new tablet server, does it show a deadlock?

No

On 1/13/15, Eric Newton <eric.newton@gmail.com> wrote:
> This may be a result of ACCUMULO-3372.  If you jstack your new tablet
> server, does it show a deadlock?
>
> $ jps -m
> 12345 Main tserver --address host:9997
>
> $ jstack 12345 | grep -i deadlock
> Deadlock detected
>
> This particular bug only happens at start-up.  There's a trivial patch
> (which you can find through the bug report), which will be in accumulo
> 1.6.2.
>
> -Eric
>
>
> On Mon, Jan 12, 2015 at 4:06 PM, Denis <denis@camfex.cz> wrote:
>
>> I have not tried yet anything newer than 1.6.1
>>
>> On 1/12/15, Josh Elser <elserj@apache.org> wrote:
>> > Denis wrote:
>> >> created https://issues.apache.org/jira/browse/ACCUMULO-3471
>> >
>> > Thanks a bunch!
>> >
>> >> BTW, In 1.6.1 also balancing may get stuck until the master server is
>> >> restarted.
>> >
>> > Is this a known issue in 1.6.1 that's been since fixed or is it still
>> > outstanding?
>> >
>> >> But then, after the master restart, balancing works very
>> >> "aggressively", putting many tablets offline for quite long time
>> >> (minutes)
>> >>
>> >> On 1/11/15, Denis<denis@camfex.cz>  wrote:
>> >>> Sometimes it left unbalanced with new tserver hosts zero tablets or
>> >>> much less that others.
>> >>> So I had to restart master to initiate the balancing process.
>> >>> Then balancing was performed slowly without putting thousands of
>> >>> tablets offline.
>> >>>
>> >>> On 1/11/15, John Vines<vines@apache.org>  wrote:
>> >>>> I have a hunch that the 1.4 version being used possibly had one
or
>> more
>> >>>> of
>> >>>> the many bugs regarding balancing getting 'stuck', which was
>> >>>> typically
>> >>>> resolved via bouncing the master. Denis, in 1.4 when you brought
you
>> >>>> tserver back online, did you find that things were then balanced
or
>> did
>> >>>> you
>> >>>> just have a tserver up and things were left unbalanced?
>> >>>>
>> >>>> On Sun, Jan 11, 2015 at 11:30 AM, Denis<denis@camfex.cz> 
wrote:
>> >>>>
>> >>>>> yes, per server
>> >>>>>
>> >>>>> On 1/11/15, Sean Busbey<busbey@cloudera.com>  wrote:
>> >>>>>> On Sat, Jan 10, 2015 at 3:42 PM, Denis<denis@camfex.cz>
 wrote:
>> >>>>>> On 1/10/15, Christopher<ctubbsii@apache.org>  wrote:
>> >>>>>>
>> >>>>>>> ...
>> >>>>>>> 3) how many tablets do you have per server?....
>> >>>>>> 3. about 6000
>> >>>>>>
>> >>>>>> Just to confirm, this is 6000 tablets per-server and not
6000
>> tablets
>> >>>>>> per-table or overall, right?
>> >>>>>>
>> >>>>>>
>> >>>>>> --
>> >>>>>> Sean
>> >>>>>>
>> >
>>
>

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