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Date: Thu, 5 Dec 2013 18:03:40 +0900
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Subject: Re: Avro RPC in Apache Flume fails with IBM JDK
From: You Hoken <houkeny@gmail.com>
To: user@avro.apache.org
Cc: dev@avro.apache.org
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Hi,
Does anyone have the same problem?
 2013/11/18 1:19 "You Hoken" <houkeny@gmail.com>:

> Hi,
>
> I'm using Avro (1.7.2) RPC in Apache Flume 1.3.1 with the following environment.
>
>  -OS
>    SUSE Linux Enterprise Server 11 (x86_64)
>    VERSION = 11
>    PATCHLEVEL = 2
>
>  -IBM JDK
>   java version "1.6.0"
>   Java(TM) SE Runtime Environment (build pxi3260sr10fp1-20120321_01(SR10
> FP1))
>   IBM J9 VM (build 2.4, JRE 1.6.0 IBM J9 2.4 Linux x86-32
> jvmxi3260sr10fp1-20120202_101568 (JIT enabled, AOT enabled)
>   J9VM - 20120202_101568
>   JIT  - r9_20111107_21307ifx1
>   GC   - 20120202_AA)
>   JCL  - 20120320_01
>
> Avro RPC (AvroSource / AvroSink) is used to collect logs.
>
> My problem is that Avro RPC fails sometimes...
>
> in the case of success in Avro RPC, I could find the following messages in
> "flume.log".
>
> ==============================
> [TIME] INFO  [lifecycleSupervisor-1-1]
> (org.apache.flume.source.AvroSource.start:143)  - Starting Avro source
> avroSrc: { bindAddress: xxxxx, port: xxxx }...
> [TIME] INFO  [lifecycleSupervisor-1-3]
> (org.apache.flume.source.AvroSource.start:185)  - Avro source avroSrc
> started.
> ==============================
>
> but in the case of failure, I could not find " Avro source avroSrc started.
> " message.
> # though I found "Starting Avro source avroSrc".
>
> so, I think that the biggest problem is failure of starting Avro source.
>
> and furthermore, implemented debug log in the source code to trace in
> detail, and start and stop repeatedly,
> then I found that MessageDigest#getInstance("MD5") in
> org.apache.avro.Protocol#getMD5() hang up.
>
> does anyone know the cause of this problem and how to solve ?
>
> I guess this problem might be caused when using IBM JDK. how do you think ?
> is this problem related to [AVRO-1221]?
>
> and one more question,
> when Avro source started successfully, I suppose that MD5 digest is same
> value each time.
> so, what does MD5 digest need for ?
>
> regards,
>
> You
>
>

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