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From "Kristian Waagan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DERBY-5234) Unable to insert data into table. Failed due be "ERROR XSDG0: Page Page(51919,Container(0, 1104)) could not be read from disk."
Date Wed, 18 May 2011 09:15:48 GMT

    [ https://issues.apache.org/jira/browse/DERBY-5234?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13035242#comment-13035242
] 

Kristian Waagan commented on DERBY-5234:
----------------------------------------

Varma, some comments below:

a) It's not clear to me if you run with the Derby debug build, i.e. the debug bundle named
"db-derby-10.x.y.z-lib-debug.zip" (downloadable from the Apache Derby site).
    My hope was that it would detect if there was invalid metadata when accessing the table.

b) This is probably a dead end anyway (unless item d suggests otherwise). In any case, I think
it would only matter on the production system since I assume that's where the data was actually
written to disk.

c) Interesting. So it appears that the compress operation is able to rectify the state that's
causing the insert to fail.
    If asked for, could the data file for the apparently corrupted table (or the whole database)
be made public?

Compressing a table is done to reclaim unused disk space for the base table and the indexes.
If your load consists of a high rate of deletes and updates, it might be worth running it
periodically if possible. See the Reference Guide and "Reclaiming unused space" in the Derby
Server and Administration Guide for details.

I'm hoping someone with a more intimate knowledge about the Derby store can point us in the
right direction, and it would be nice to obtain the size of the corrupted table.
It seems Derby fails to read back a newly created page, which is odd...

> Unable to insert data into table. Failed due be "ERROR XSDG0: Page Page(51919,Container(0,
1104)) could not be read from disk."
> -------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: DERBY-5234
>                 URL: https://issues.apache.org/jira/browse/DERBY-5234
>             Project: Derby
>          Issue Type: Bug
>          Components: JDBC, Network Server, SQL
>    Affects Versions: 10.5.3.0
>         Environment: HP-UX 11iv2 in production environment with JDK1.6; Solaris 5/10
in test environment with JDK 1.6
>            Reporter: Varma R
>              Labels: ERROR, XSDG0, apache, corruption, data, derby
>
> One of the derby database table "gets corrupted"/"indicates connection not available"
during processing inserts from java client application as shown in the trace and the only
way to recover from this error is to rebuild the DB - by deleting the data and creating the
tables again. This happens once in a while (thrice in a span of two months) and the java application
(run in multiple servers), which updates the database, processes around 100 million transactions
per hour (in total and each transation results in 4-5 updates to the DB) 
> There are eight tables in the derby database.
>    TABLE NAME                           ROWS COUNT (at time of corruption)
> ---------------------------------------------------------------------------------
>    KPI.KPI_MERGEIN;                     362917
>    KPI.KPI_IN;                                 422508
>    KPI.KPI_DROPPED;                    53667
>    KPI.KPI_ERROR1;                       0
>    KPI.KPI_ERROR2;                       2686
>    KPI.KPI_ERRORMERGE;            0
>    KPI.KPI_MERGEOUT;                 362669
>    KPI.KPI_OUT;                             125873
> The derby database has been started with the following parameters 
> CMD="java -Dderby.system.home=$DERBY_OPTS -Dderby.locks.monitor=true -Dderby.locks.deadlockTrace=true
-Dderby.locks.escalationThreshold=50000 -Dderby.locks.waitTimeout=
> -1 -Dderby.storage.pageCacheSize=100000 -Xms512M -Xmx3072M -XX:NewSize=256M -classpath
$DERBY_CLASSPATH org.apache.derby.drda.NetworkServerControl start -h $KPIDERBYHOST -p $DERBY_KPI_PORT"
> The corrupted database tar (filesystem) in live environment was moved to a test system
(Solaris system) and few checks were run on the corrupted DB as part of analysis (DB does
start fine)
> While trying to insert a row in any table expect KPI.KPI_MERGEIN, it is successful. But
when a new row is inserted into KPI.KPI_MERGEIN table using command line tool it's throwing
below error message (the same message that appeared in live 
> ij> INSERT INTO KPI.KPI_MERGEIN (A0_TXN_ID, A1_NE_ID, A2_CHU_IP_ADDR, A3_BATCH_DATE,A5_CODE)
VALUES (-1, 'BMTDE', '192.2.1.3', 231456879, 'KSD');
> ERROR 08006: A network protocol error was encountered and the connection has been terminated:
the requested command encountered an unarchitected and implementation-specific condition for
which there was no architected message
> and in derby.log file it shows below error stacktrace.
> ERROR XSDG0: Page Page(51919,Container(0, 1104)) could not be read from disk.
>         at org.apache.derby.iapi.error.StandardException.newException(Unknown Source)
>         at org.apache.derby.impl.store.raw.data.CachedPage.readPage(Unknown Source)
>         at org.apache.derby.impl.store.raw.data.CachedPage.setIdentity(Unknown Source)
>         at org.apache.derby.impl.services.cache.ConcurrentCache.find(Unknown Source)
>         at org.apache.derby.impl.store.raw.data.FileContainer.initPage(Unknown Source)
>         at org.apache.derby.impl.store.raw.data.FileContainer.newPage(Unknown Source)
>         at org.apache.derby.impl.store.raw.data.BaseContainer.addPage(Unknown Source)
>         at org.apache.derby.impl.store.raw.data.BaseContainerHandle.addPage(Unknown Source)
>         at org.apache.derby.impl.store.access.heap.HeapController.doInsert(Unknown Source)
>         at org.apache.derby.impl.store.access.heap.HeapController.insertAndFetchLocation(Unknown
Source)
>         at org.apache.derby.impl.sql.execute.RowChangerImpl.insertRow(Unknown Source)
>         at org.apache.derby.impl.sql.execute.InsertResultSet.normalInsertCore(Unknown
Source)
>         at org.apache.derby.impl.sql.execute.InsertResultSet.open(Unknown Source)
>         at org.apache.derby.impl.sql.GenericPreparedStatement.executeStmt(Unknown Source)
>         at org.apache.derby.impl.sql.GenericPreparedStatement.execute(Unknown Source)
>         at org.apache.derby.impl.jdbc.EmbedStatement.executeStatement(Unknown Source)
>         at org.apache.derby.impl.jdbc.EmbedStatement.execute(Unknown Source)
>         at org.apache.derby.impl.jdbc.EmbedStatement.executeUpdate(Unknown Source)
>         at org.apache.derby.impl.drda.DRDAConnThread.parseEXCSQLIMM(Unknown Source)
>         at org.apache.derby.impl.drda.DRDAConnThread.processCommands(Unknown Source)
>         at org.apache.derby.impl.drda.DRDAConnThread.run(Unknown Source)
> Caused by: java.io.EOFException: Reached end of file while attempting to read a whole
page.
>         at org.apache.derby.impl.store.raw.data.RAFContainer4.readFull(Unknown Source)
>         at org.apache.derby.impl.store.raw.data.RAFContainer4.readPage0(Unknown Source)
>         at org.apache.derby.impl.store.raw.data.RAFContainer4.readPage(Unknown Source)
>         ... 20 more
> ============= begin nested exception, level (1) ===========
> java.io.EOFException: Reached end of file while attempting to read a whole page.
>         at org.apache.derby.impl.store.raw.data.RAFContainer4.readFull(Unknown Source)
>         at org.apache.derby.impl.store.raw.data.RAFContainer4.readPage0(Unknown Source)
>         at org.apache.derby.impl.store.raw.data.RAFContainer4.readPage(Unknown Source)
>         at org.apache.derby.impl.store.raw.data.CachedPage.readPage(Unknown Source)
>         at org.apache.derby.impl.store.raw.data.CachedPage.setIdentity(Unknown Source)
>         at org.apache.derby.impl.services.cache.ConcurrentCache.find(Unknown Source)
>         at org.apache.derby.impl.store.raw.data.FileContainer.initPage(Unknown Source)
>         at org.apache.derby.impl.store.raw.data.FileContainer.newPage(Unknown Source)
>         at org.apache.derby.impl.store.raw.data.BaseContainer.addPage(Unknown Source)
>         at org.apache.derby.impl.store.raw.data.BaseContainerHandle.addPage(Unknown Source)
>         at org.apache.derby.impl.store.access.heap.HeapController.doInsert(Unknown Source)
>         at org.apache.derby.impl.store.access.heap.HeapController.insertAndFetchLocation(Unknown
Source)
>         at org.apache.derby.impl.sql.execute.RowChangerImpl.insertRow(Unknown Source)
>         at org.apache.derby.impl.sql.execute.InsertResultSet.normalInsertCore(Unknown
Source)
>         at org.apache.derby.impl.sql.execute.InsertResultSet.open(Unknown Source)
>         at org.apache.derby.impl.sql.GenericPreparedStatement.executeStmt(Unknown Source)
>         at org.apache.derby.impl.sql.GenericPreparedStatement.execute(Unknown Source)
>         at org.apache.derby.impl.jdbc.EmbedStatement.executeStatement(Unknown Source)
>         at org.apache.derby.impl.jdbc.EmbedStatement.execute(Unknown Source)
>         at org.apache.derby.impl.jdbc.EmbedStatement.executeUpdate(Unknown Source)
>         at org.apache.derby.impl.drda.DRDAConnThread.parseEXCSQLIMM(Unknown Source)
>         at org.apache.derby.impl.drda.DRDAConnThread.processCommands(Unknown Source)
>         at org.apache.derby.impl.drda.DRDAConnThread.run(Unknown Source)
> ============= end nested exception, level (1) ===========
> 2011-05-16 10:37:21.392 GMT:
> Shutting down instance a816c00e-012f-f85f-7892-ffff874c3ff6
> ----------------------------------------------------------------
> Cleanup action completed
> The problem is only with INSERT statement. When i try SELECT statement on KPI.KPI_MERGEIN
table it is working well.The database file system size (in seg0) is 1.3 GB
> Can anyone help me out in identifying the problem that why for one table alone its throwing
the above error message ? Would upgrade to a new version help ? 

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