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Subject: RE: [jira] Commented: (DERBY-1653) Database gets corrupt after
 throwingNPE while reading Binary Stream data, in chunks
Date: Wed, 16 Aug 2006 17:23:42 +0530
Message-ID: <D21AE0B853E1B54AB9294B7258E898A997B1B6@PUNMAIL.symphonysv.com>
Thread-Topic: [jira] Commented: (DERBY-1653) Database gets corrupt after
 throwingNPE while reading Binary Stream data, in chunks
Thread-Index: Aca70LQYO1yb9zYfReGeYB3DiDlTrAFWYiqw
From: "Dipali Sunkersett" <Dipali.Sunkersett@symphonysv.com>
To: "Sunitha Kambhampati \(JIRA\)" <derby-dev@db.apache.org>

Hi Sunitha,

Thanks for you reply.=20

We tried with a new JVM and the DB was still not accessible.
Unfortunately, we deleted that DB and hence, do not have log file of
derby. We are using jvm ver 1.5.0_05

Currently, we are busy with a major release and hence, wouldn't find
time and/or a spare machine to reproduce the problem. Will try that next
week and update Derby Bug DB, with more findings.

Thank you again, for responding back.

Regards,
Dipali Sunkersett

Symphony Services
dipali.sunkersett@symphonysv.com


-----Original Message-----
From: Sunitha Kambhampati (JIRA) [mailto:derby-dev@db.apache.org]=20
Sent: Wednesday, August 09, 2006 9:57 PM
To: Dipali Sunkersett
Subject: [jira] Commented: (DERBY-1653) Database gets corrupt after
throwingNPE while reading Binary Stream data, in chunks

    [
http://issues.apache.org/jira/browse/DERBY-1653?page=3Dcomments#action_12=
4
26962 ]=20
           =20
Sunitha Kambhampati commented on DERBY-1653:
--------------------------------------------

It would be helpful if you can provide more information
-- can you attach the derby.log from when the error happened
-- have you tried to stop all processes and then start up again and try
to access the database.
-- will it be possible to attach the corrupt database to the JIRA?
-- which jvm are you using.=20

Thanks.

> Database gets corrupt after throwing NPE while reading Binary Stream
data, in chunks
>
------------------------------------------------------------------------
------------
>
>                 Key: DERBY-1653
>                 URL: http://issues.apache.org/jira/browse/DERBY-1653
>             Project: Derby
>          Issue Type: Bug
>    Affects Versions: 10.1.3.1
>         Environment: Linux (Debian) Kernel 2.6.16
>            Reporter: Dipali Sunkersett
>            Priority: Critical
>
> One of the component of our project pushes large text (as a binary
stream) into Derby DB. The other component retrieves these texts in
chunks and process one text at a time to perform some manipulation.
After fetching and processing roughly 30K texts, we get an NPE and the
whole DB gets corrupt after that. We can not connect to that DB again.
We use the "org.apache.derby.jdbc.EmbeddedDriver" for connecton. The
stack trace is as below:
> java.lang.NullPointerException
>         at
org.apache.derby.impl.store.raw.data.BasePage.releaseExclusive(Unknown
Source)
>         at
org.apache.derby.impl.store.raw.data.CachedPage.releaseExclusive(Unknown
Source)
>         at
org.apache.derby.impl.store.raw.data.StoredPage.releaseExclusive(Unknown
Source)
>         at
org.apache.derby.impl.store.raw.data.BasePage.unlatch(Unknown Source)
>         at
org.apache.derby.impl.store.raw.data.OverflowInputStream.fillByteHolder(
Unknown Source)
>         at
org.apache.derby.impl.store.raw.data.BufferedByteHolderInputStream.avail
able(Unknown Source)
>         at
java.io.FilterInputStream.available(FilterInputStream.java:146)
>         at
java.io.FilterInputStream.available(FilterInputStream.java:146)
>         at
sun.nio.cs.StreamDecoder$CharsetSD.inReady(StreamDecoder.java:490)
>         at
sun.nio.cs.StreamDecoder$CharsetSD.implRead(StreamDecoder.java:451)
>         at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:183)
>         at java.io.InputStreamReader.read(InputStreamReader.java:167)
>         at java.io.BufferedReader.fill(BufferedReader.java:136)
>         at java.io.BufferedReader.readLine(BufferedReader.java:299)
>         at java.io.BufferedReader.readLine(BufferedReader.java:362)
>         at
com.irm.dag.occcalc.command.CorpusWordPhraseOccCalc.calculateOccurrences
(CorpusWordPhraseOccCalc.java:128)
>         at
com.irm.dag.occcalc.command.CorpusOccCalc.calculate(CorpusOccCalc.java:4
4)
>         at
com.irm.dag.occcalc.test.WrapperForOccurrenceCalculator.main(WrapperForO
ccurrenceCalculator.java:56)

--=20
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       =20