Steve,
I'm not getting systematic failures, even after running multiple times
for well over 4 hours. I saw one failure but had several runs with no
failure at all. Looks like my setup does not have the right timing.
I've changed the internal exception point to print (stderr) some details
and exit the VM:
if ( ! pageMgr.valid(pageId) ) {
String msg =
"RecordRangeIterator.iterator -- No such block (pageId="+
pageId+
", fromRec="+fromRec+", toRec="+toRec+ ")" ;
System.err.println(msg) ;
System.exit(0) ;
throw new BlockException(msg) ;
}
Do you have some test servers you could run your test code with the
development Jena? Ideally, running multiple tests so we build up a
number of outcomes to see if there is a pattern.
https://repository.apache.org/content/repositories/snapshots/org/apache/jena/
apache-jena/2.11.2-SNAPSHOT for a binary build or use maven directly on
apache-jena-libs.
The other thing that may well be needed is a more sensitive test case.
Running in the debugger is too slow to be practical.
What other patterns of transactions have you tried?
Andy
On 24/01/14 16:00, Steve Groeger wrote:
Andy,
I am currently running with the TDB being written to my harddrive (of my
Linux RHEL 64bit machine). This failure can sometimes take up to 3-4 hours
before it fails.
I have tried using a RAM disk but it fills up before the failure occurs as
I can only give it 10Gb of space and due the test the TDB does get very
large due to all the creates & deletes.
I am running on RHEL 6.4 with the following JVM:
java version "1.6.0"
Java(TM) SE Runtime Environment (build
pxa6460sr15-20131017_01(SR15))
IBM J9 VM (build 2.4, JRE 1.6.0 IBM J9 2.4 Linux amd64-64
jvmxa6460sr15-20131016_170922 (JIT enabled, AOT enabled)
J9VM - 20131016_170922
JIT - r9_20130920_46510ifx2
GC - GA24_Java6_SR15_20131016_1337_B170922)
JCL - 20131015_01
Thanks
Steve Groeger
IBM WebSphere Service Registry Development
MP 211, Hursley
Tel: (44) 1962 816911 Mobex: 279990 Mobile: 07718 517 129
Fax (44) 1962 816800
Lotus Notes: Steve Groeger/UK/IBM
Internet: groe...@uk.ibm.com
From: Andy Seaborne <a...@apache.org>
To: users@jena.apache.org,
Date: 24/01/2014 13:57
Subject: Re: BlockException: No such block
On 24/01/14 07:18, Steve Groeger wrote:
It took 16690 iterations of the writer thread to obtain this error but
as
you can see the reader thread gets the exception when trying to execute
this line:
How long in time did that take? As it may be a timing issue, do you
have an SSD?
Running
java version "1.7.0_51"
OpenJDK Runtime Environment (IcedTea 2.4.4) (7u51-2.4.4-0ubuntu0.13.10.1)
OpenJDK 64-Bit Server VM (build 24.45-b08, mixed mode)
Andy
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