---------------------------------------------------------------------- HP ELOQUENCE A.06.30 - patch 0009080 ---------------------------------------------------------------------- This patch fixes a defect of the eloqdb6 program as released with A.06.30. This patch will be integrated in the A.06.30 release. A.06.30 must be installed before applying this patch. This patch replaces patch PE63-0006020. Severity: CRITICAL (panic, data corruption) Fixed problems: --------------- Platforms: All * A problem related to stopping online backup mode was solved. Depending on database usage during online backup this could result in data corruption when stopping online backup mode. When the HP Eloquence database is in online backup mode committed transactions are saved in the log volume not the data volume(s). When the online backup mode is stopped (through dbctl backup stop) committed transactions are transferred from the log volume to the data volume(s). This could cause an extension of the data volume. A volume extension while transferring committed transactions from the log volume to the data volume could cause corruption of information in the log volume. Symptoms: - server panic after stopping online backup mode - dbfsck reports volume corruption * Under rare circumstances a volume crash recovery could corrupt the data volumes. This can happen when the eloqdb6 server has crashed or was terminated with kill -9. In this case all committed transactions since the last checkpoint operation are recovered from the log volume during eloqdb6 startup. A problem was found if a data area affected by a transaction was deleted by a subsequent transaction and has been re-used since the last checkpoint operation. In some cases this could lead to corruption of structural volume information. This has been fixed by delaying page re-use until the next checkpoint operation. Symptoms: - server panic during volume crash recovery * When an eloqdb6 server panic (internal error) is encountered the eloqdb6 process restarts itself by default. This can be configured in the eloqdb6.cfg configuration file with the panic= configuration item. When eloqdb6 encounters a fatal problem during startup this will cause eloqdb6 to be started in an endless loop, possibly filling the log file and using system resources. Now eloqdb6 will not restart automatically if a problem during restart is encountered. Patch PE63-0006020 ------------------ Platforms: All * A problem related to rollback of subtransactions was solved. Depending on database usage this could result in btree corruption or an eloqdb6 server panic. When a subtransaction was rolled back but the main transaction continued it could happen that invalidated btree information remained in memory and was used by subsequent btree operations. This problem could only happen when using transactions. Symptoms: - Assertion failed: f_bhp->id.node_id == node_id server panic: Aborting on internal failure, file mpool.c, line 392 - DBPUT failed due to duplicate secondary index - dbfsck reports corrupted btree pages Impact: A database which shows the symptoms above must be reloaded (dbexport, dberase and dbimport). Information besides internal btree is not affected. * The eloqdb6 server could panic during processing volume recovery complaining about a buffer leak. This was caused by a bug processing defective recovery information from the log volume. * Cache buffer management has been tuned to provide better performance for delete and update operations in a transaction. This should also improve the impact of transactions on concurrent read operations. Installation ------------ UNIX: In order to install this patch, you need to unpack it with gzip. Gzip is included with HP-UX 10.x and Linux. Installation requires root privileges. cd /opt/eloquence6 gzip -dc /path/to/PE63-0009080-hpux.tar.gz | tar xf - Files: bin/eloqdb6 bin/dblogreset share/doc/PE63-0009080-README Windows NT: This patch should *only* be installed if you previously installed the HP Eloquence server components on your system. Download the PE63-0009080-win32.zip file and unpack with WINZIP or PKZIP. Installation requires administrative capabilities. PLEASE MAKE SURE THE EloqDB6 SERVICE has been STOPPED previously (in the Service Control Manager). Please copy the eloqdb6.exe file into the WINDOWS SYSTEM DIRECTORY (for example C:/WINNT/SYSTEM32) and the dbvolcreate.exe and dblogreset.exe files to the bin subdirectory of your HP Eloquence installation directory (for example C:/Programs/Hewlett-Packard/HP Eloquence/bin). Files: eloqdb6.exe dblogreset.exe PE63-0009080-README.txt