Mailing-List: contact user-help@hbase.apache.org; run by ezmlm
Precedence: bulk
Reply-To: user@hbase.apache.org
Received-SPF: pass (nike.apache.org: domain of yuzhihong@gmail.com designates
 209.85.217.175 as permitted sender)
MIME-Version: 1.0
In-Reply-To: 
 <OF0768FDFF.DDA95B90-ON85257C0B.0076C01E-85257C0B.007725F2@us.ibm.com>
References: 
 <OF0768FDFF.DDA95B90-ON85257C0B.0076C01E-85257C0B.007725F2@us.ibm.com>
Date: Mon, 21 Oct 2013 14:50:26 -0700
Message-ID: 
 <CALte62zXHBkBuZuUDip9DcUe6MC7N-9BEsvvQj7S4o85VWNGGQ@mail.gmail.com>
Subject: Re: coprocessor status query
From: Ted Yu <yuzhihong@gmail.com>
To: "user@hbase.apache.org" <user@hbase.apache.org>
Content-Type: multipart/alternative; boundary=089e0117691598655b04e947453d

--089e0117691598655b04e947453d
Content-Type: text/plain; charset=ISO-8859-1

w.r.t. #3, there is a config parameter: "hbase.coprocessor.abortonerror"
which determines whether the hosting server should abort.

See the following tests for examples:
hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestMasterCoprocessorExceptionWithAbort.java
hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestMasterCoprocessorExceptionWithRemove.java
hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestRegionServerCoprocessorExceptionWithAbort.java
hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestRegionServerCoprocessorExceptionWithRemove.java

Cheers


On Mon, Oct 21, 2013 at 2:41 PM, Wei Tan <wtan@us.ibm.com> wrote:

> Hello, I want to check the status of each coprocessor, in a given table.
> Let's say I have 3 CPs and one of them is removed due to some unhandled
> exception, so I want to see this status (3 deployed, 2 currently alive).
>
> I found this from
> http://blogs.apache.org/hbase/entry/coprocessor_introduction so my
> question is:
>
> 1. is the coprocessor shown in shell the actually live one, i.e.,
> excluding those loaded but removed later?
> 2. is there a way to get it from Java API?
> 3. as far as I understand, during an un-handled exception, the
> coprocessorhost will remove this cp from ALL region servers, not only the
> server where the exception occurs? Is it correct?
>
> Thanks,
> Wei
>
> HBase Shell Coprocessor Status
> After a coprocessor has been configured, you also need to check the
> coprocessor status using the shell or master and region server web UIs to
> determine if the coprocessor has been loaded successfully.
> Shell command:
> hbase(main):018:0>  alter 't1', METHOD => 'table_att',
>
>
> 'coprocessor'=>'|org.apache.hadoop.hbase.coprocessor.AggregateImplementation|1001|arg1=1,arg2=2'
> Updating all regions with the new schema...
> 1/1 regions updated.
> Done.
> 0 row(s) in 1.1060 seconds
>
> hbase(main):019:0> enable 't1'
> 0 row(s) in 2.0620 seconds
>
> hbase(main):020:0> status 'detailed'
> version 0.92-tm-6
> 0 regionsInTransition
> master coprocessors: []
> 1 live servers
>     localhost:52761 1328082515520
>         requestsPerSecond=3, numberOfOnlineRegions=3, usedHeapMB=32,
> maxHeapMB=995
>         -ROOT-,,0
>             numberOfStores=1, numberOfStorefiles=1,
> storefileUncompressedSizeMB=0, storefileSizeMB=0, memstoreSizeMB=0,
> storefileIndexSizeMB=0, readRequestsCount=54, writeRequestsCount=1,
> rootIndexSizeKB=0, totalStaticIndexSizeKB=0,
> totalStaticBloomSizeKB=0, totalCompactingKVs=0, currentCompactedKVs=0,
> compactionProgressPct=NaN, coprocessors=[]
>         .META.,,1
>             numberOfStores=1, numberOfStorefiles=0,
> storefileUncompressedSizeMB=0, storefileSizeMB=0, memstoreSizeMB=0,
> storefileIndexSizeMB=0, readRequestsCount=97, writeRequestsCount=4,
> rootIndexSizeKB=0, totalStaticIndexSizeKB=0,
> totalStaticBloomSizeKB=0, totalCompactingKVs=0, currentCompactedKVs=0,
> compactionProgressPct=NaN, coprocessors=[]
>         t1,,1328082575190.c0491168a27620ffe653ec6c04c9b4d1.
>             numberOfStores=2, numberOfStorefiles=1,
> storefileUncompressedSizeMB=0, storefileSizeMB=0, memstoreSizeMB=0,
> storefileIndexSizeMB=0, readRequestsCount=0, writeRequestsCount=0,
> rootIndexSizeKB=0, totalStaticIndexSizeKB=0,
> totalStaticBloomSizeKB=0, totalCompactingKVs=0, currentCompactedKVs=0,
> compactionProgressPct=NaN,
> coprocessors=[AggregateImplementation]
> 0 dead servers
>
> If you cannot find the coprocessor loaded, you need to check the server
> log files to discover the reason for its failure to load.

--089e0117691598655b04e947453d--