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ELOQUENCE B.08.00 - patch PE80-1109210

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This patch adds enhancements or fixes defects of the eloqdb server
program as released with Eloquence B.08.00. This patch will be
integrated in the Eloquence B.08.00 release.

Eloquence B.08.00 must be installed before applying this patch.

Severity:
 PE80-1109210: BUG FIX

Superseded patches:
 PE80-1109020: BUG FIX
 PE80-1012200: BUG FIX
 PE80-1005250: BUG FIX, ENHANCEMENT
 PE80-1002230: BUG FIX
 PE80-1001190: BUG FIX, ENHANCEMENT
 PE80-0912280: BUG FIX
 PE80-0911090: BUG FIX
 PE80-0909220: BUG FIX
 PE80-0907030: BUG FIX
 PE80-0906080: BUG FIX, ENHANCEMENT
 PE80-0905130: BUG FIX
 PE80-0904270: BUG FIX
 PE80-0904240: BUG FIX
 PE80-0904060: BUG FIX
 PE80-0903270: BUG FIX
 PE80-0903060: BUG FIX
 PE80-0903040: BUG FIX
 PE80-0902091: ENHANCEMENT
 PE80-0901090: BUG FIX
 PE80-0812180: BUG FIX


Patch PE80-1109210
------------------

Platforms: All

* The dbctl list db and dbopen commands as well as the HTTP status
  database list could in rare cases cause the database server to
  abort due to a segment violation (#4062).

  This was caused by an internal race condition where a session
  was accessed that was just shutting down.


Patch PE80-1109020
------------------

Platforms: All

* Fixed a problem that could result in a database server hang
  due to an internal deadlock under rare conditions (#4059).

  If a data volume runs out of space while on-line backup mode
  is active, a transaction record is written to the log volume
  to postpone the data volume extension until on-line backup
  mode is stopped.

  Under rare conditions, writing this transaction record could
  overlap with a concurrent checkpoint operation in a way that
  an internal deadlock could occur.


Patch PE80-1012200
------------------

Platforms: All

* Fixed a problem where in a rare corner case the database server
  process could abort with a message like below (#3781):

  Assertion failed: !node->ref_count
  server panic: Aborting on internal failure, file nodecore.c, line 386

  This was caused by an internal race condition between client
  session termination and a concurrent dbpurge operation on one
  of the involved databases.

* Fixed a problem that could result in a server panic when
  deleting a record. The following message is written to the
  server message log:

  Assertion failed: set_ctx->idx_mode == IS_INVAL

  This can happen under the following conditions:
  1. The database is accessed from the Eloquence language
  2. The database client cache is enabled
  3. Some records were read (eg. sequential) but additional
     records are in cache
  4. A DBFIND on an index item in the same data set is called
  5. A DBELETE is called to delete the record

  In this case the current record differs between the client
  and server side and nees to be re-established. However, a
  DBDELETE did not expect a previous index lookup in this case.

Platforms: Windows

* Fixed a problem on the Windows platform related to HTTP status
  timeout introduced with patch PE80-1005250.


Patch PE80-1005250
------------------

Platforms: All

* The HTTP status was fixed to correctly support a timeout.

* The HTTP status was enhanced to display additional information
  on the installed license in the config web page.

* The server was enhanced to implicitly grant a DBA user
  administrative capabilities on a database. Previous versions by
  default granted administrative capabilities only to the account
  that was used to create the database.

  As a consequence, the following behavior is changed: Any user
  with DBA privileges may
  - purge or erase any database
  - dbstore or dbrestore any database
  - perform a dbdumpcat on any database
  - change the database structure
  - change the database access rights

  Please note that some of these functions are only available with
  an updated dbutil version.

  With previous server versions only the user that created a
  database (or was granted administrative capabilities subsequently)
  was able to perform these tasks. Other users, even with DBA
  privileges would fail.

* The DBUPDATE mode 2 on a master set was changed to return
  status 43:0 instead of -804:0 when a duplicate key item value
  is specified.

* Fixed a problem where in rare cases the a status -700:-3 was
  returned when establishing a connection to the db server.

  This was caused by a race condition when sessions connect and
  disconnect concurrently. In rare cases it could happen that
  queued events for a disconnected server connection were
  attributed to a new connection. This could have the effect
  that the db server terminated a session that was just started.

  Please notice there are a number of other causes for a
  status -700:-3 (such as lack of kernel or db server resources).

Platforms: Linux

* Fixed a problem with dbctl killthread not terminating an idle
  thread.


Patch PE80-1002230
------------------

Platforms: All

* Fixed a problem where in rare cases the database server process could
  abort with a message like below (#3948):

  Assertion failed: tcp->wchan_type == Wait_OTHER && !tcp->wchan.ptr
  server panic: Aborting on internal failure, file thread.c, line 4813

  This was caused by a race condition where a thread status was tested
  without obtaining the required lock. In rare cases it could happen
  the thread status changed unexpectedly.


Patch PE80-1001190
------------------

Platforms: All

* The dbctl list session and dbctl list dbopen commands could in rare
  cases cause the database server to abort with a message like below
  if a filter condition was used (#3929):

  Assertion failed: audit
  server panic: Aborting on internal failure, file ssn_util.c, line 1245

  This was caused by an internal race condition where a session was
  accessed that was just shutting down.

* Improved the database compatibility checks on DBOPEN (#3930).

* Improved the compatibility with dbstore archives that were created
  from databases that were previously recovered or replicated (#3921).


Patch PE80-0912280
------------------

Platforms: All

* Fixed a problem where in rare cases the buffer cache failed to write
  a page modification to disk due to an internal race condition, resulting
  in an incorrect free-list page link/pointer (#3853).

  This caused the database server to abort subsequently with a message like
  below:

  Assertion failed: freelist_miss == 0
  server panic: Aborting on internal failure, file volfrec.c, line 1065

  When encountering this issue the dbfsck utility may be used to correct
  the damaged free-record lists. It is recommended to use the dbfsck version
  from patch PE80-0912040 (or newer).

* A database restructuring could temporarily require significantly more
  available disk space in the data volume(s), as compared to Eloquence
  B.07.10 (#3908).

  While restructuring a data set, a lock was held that could block the
  checkpoint thread. If the checkpoint thread is blocked, temporarily
  occupied space in the data volume is not timely released.

* Performing a replication or recovery after an abort of the database
  server process could in rare cases lead to inconsistent data set meta
  information (#3909).

  After an abnormal termination, the database server (or the dblogreset
  utility) perform a startup recovery. During this process, a special
  forward-log "bridge" segment is created that allows a dbrecover, dbrepl
  or fwutil process to continue across the previous abnormal termination.

  Replicating this bridge segment, or using it with dbrecover, could
  in rare cases incompletely update the data set meta information.

* The dbctl list dbopen command could in rare cases cause the database
  server to abort due to a segment violation. This was caused by an
  internal race condition where a session was accessed that was just
  shutting down.

* Fixed a race condition that could cause a corrupted disconnection log
  message output to the server message log (#3858).


Patch PE80-0911090
------------------

Platforms: All

* An internal counter overflow could cause the database server to
  abort in rare cases with a message like below (#3875):

  Assertion failed: unexpected recursive lock
  server panic: Aborting on internal failure, file thread.c, line 1490

  An internal 32-bit variable is incremented on every committed
  transaction and may therefore overflow after ~4 billion commit
  operations. This overflow is handled but could cause an unexpected
  side effect.

* Searching an index could cause the database server to abort in rare
  cases with one of the below messages or a segmentation fault
  condition (#3879, #3880):

  Assertion failed: tmp_bhp->id.node_id == node_id
  server panic: Aborting on internal failure, file mpool.c, line 972

  Assertion failed: bhp != NULL
  server panic: Aborting on internal failure, file mpool.c, line 2582

  While an index is searched, a concurrently committed transaction
  may invalidate the index tree and the search operation must be
  restarted. In some rare cases, this conflict was detected too late
  and the search was continued although the index tree was invalidated
  in the meantime. As a consequence, index pages that did not have
  the expected state or no longer belonged to the index could be
  read. If this was detected, data corruption was assumed and a
  server panic was issued. If not, accessing the page contents
  caused a segmentation fault.

* A dbutil CHANGE IITEM operation did not rebuild the associated
  indexes if only the offset into an item was changed for an index
  segment (#3884).

  As a consequence, the index data did not correspond to the index
  specification in the database schema.

  The index could be manually rebuilt to solve this problem. For
  example, the dbutil script below rebuilds the index associated
  with the IMATCHCODE index item in the CUSTOMERS data set:

  CHANGE SET CUSTOMERS {
    DELETE INDEX IMATCHCODE;
    ADD INDEX IMATCHCODE;
  }

  To enforce rebuilding an index, delete it from the data set and
  then add it again in the same dbutil script.

* When a dbutil ADD ITEM data set clause is used to add an item
  of type P (packed) to a data set, the subsequent restructuring
  process now initializes this new P item to unsigned zero (#3857).

  Previously, a new P item was initialized to binary zero.

* After a dbutil RENAME DATABASE operation, the audit information
  in the forward-log was not updated until a new forward-log file
  was started (#3868).

  In the database audit, the renamed database remained visible
  under its previous name until the end of the current forward-log
  file.

* If a transaction was committed after a related database was closed,
  it could happen in rare cases that the associated audit information
  was not written to the forward-log (#3869).

  In such a case, the affected actions did not appear in the database
  audit.

* A forward-log bridge segment was not correctly restarted (#3883).

  After an abnormal termination, the database server (or dblogreset)
  performs a startup recovery. During this process, a so called
  forward-log bridge segment is created that allows a dbrecover or
  dbrepl or fwutil process to continue across the previous abnormal
  termination.

  If for any reason the startup recovery is aborted so that the
  bridge segment is not completely created, the bridge segment should
  be restarted and completed on the next startup recovery.

  Due to an internal initialization problem, this did not work as
  intended. As a consequence, the database server (or dblogreset)
  failed to start with a message like below if the bridge segment
  already exists:

  unable to create forward-log ... File exists (errno 17)
  Note: failed to restart forward-logging

  To solve this problem, the existing bridge segment must be manually
  deleted before starting the database server or dblogreset.

* An internal race condition could cause an unexpected time stamp
  information in the database server log file.

  If log entries were written simultaneously by concurrent threads,
  a wrong time stamp information could be output.

* When reporting a server panic, the database server often issued
  another server panic caused by a segmentation fault condition.
  This is now suppressed.

  Also, in case of a server panic the IPC semaphore resources were
  not properly cleaned up.


Patch PE80-0909220
------------------

Platforms: All

* Fixed a problem which in a rare corner case could cause a database
  server to abort with a message like below (#3852):

  Assertion failed: tx_data_prev.op == BT_TX_NewPage || tx_data_prev.op == BT_TX_UpdPage
  server panic: Aborting on internal failure, file btree.c, line 1089

  This was a transient problem, caused by an internal race condition,
  and had no impact on the database, except that the database server
  had to be restarted.


Patch PE80-0907030
------------------

Platforms: All

* Fixed a potential memory leak when using multiple consecutive
  wildcard characters in a DBFIND argument (#3794).

* Fixed a problem with DBFIND wildcard arguments where a "?*"
  sequence was evaluated as a single '*' wildcard character (#3794).


Patch PE80-0906080
------------------

Platforms: All

* Fixed a potential memory leak when a dbctl list output exceeded
  the size of the shared memory communications buffer (#3785).

* The dbctl list command was enhanced. A filter expression may be
  specified and the /count option may be used to only obtain the
  number of matching entries.

  For example:
  $ dbctl list session "pname=*query3k*"
  $ dbctl list lock /count "status=blocked"

  Please refer to the dbctl documentation for details:
  http://eloquence.marxmeier.com/support/B0800/doc/dbctl/index.html#list


Patch PE80-0905130
------------------

Platforms: All

* Fixed a problem which could cause the database server to temporarily
  hang while on-line backup mode was shutting down (#3782).

  If a checkpoint operation overlapped with stopping on-line backup
  mode, the checkpoint could block and in turn block any existing or
  new database sessions until on-line backup mode was shut down.


Patch PE80-0904270
------------------

Platforms: All

* This patch corrects a problem introduced with fix #3777 delivered
  with the previous patch PE71-0904240.


Patch PE80-0904240
------------------

Platforms: All

* The dbctl forwardlog restart command did not immediately update the
  volume generation count in the log volume (#3777).

  As a possible consequence, the database server could fail to start
  with a message like below if it was abnormally terminated after a
  dbctl forwardlog restart was issued:

  failed to open volume: volume ... has inconsistent generation count

  As a workaround it is possible to manually update the generation
  count in the log volume in this case. Please contact support if you
  are affected by this.


Patch PE80-0904060
------------------

Platforms: All

* Fixed a problem where a database was not immediately available
  after a dbutil restructuring (#3751). A subsequent DBOPEN executed
  immediately after a restructuring dbutil process had finished could
  in some cases encounter a database status -2 (database in use).

* Resuming a replication or recovery could in rare cases abort with
  a message like below (#3752):

  Assertion failed: Fwr_PageHashAdd() failed: key already present
  server panic: Aborting on internal failure, file volfwr.c, line 5367

  This could happen in a corner case if a user transaction spans
  multiple forward-log files, where BTREE PAGE actions are present
  in different files at identical offsets. Under these conditions
  the problem could be triggered if these files had to be processed
  to locate the last status of the replication progress.

* Resuming a replication or recovery could in rare cases abort with
  a message like below (#3755):

  recovery failed ... node ... page ... not in expected state
  Assertion failed: h->lower == data->lower
  server panic: Aborting on internal failure, file btree.c, line 2382

  This could happen in a corner case if a user transaction spans
  multiple forward-log files, where the transaction was executed
  immediately after the last status of the replication progress
  was found and the replication was resumed.


Patch PE80-0903270
------------------

Platforms: All

* Under certain conditions the database server could hang due to an
  internal deadlock (#3739).

  In rare cases under high load, if a deadlock was detected between
  two tasks so that one of these tasks was signaled, and at the same
  time another task detected the same conflict as the task being
  signaled, a deadlock could occur. As a consequence, the database
  server did no longer accept new connections and could not be shut
  down but had to be killed.

* In rare cases under high load, the database server could abort with
  a message like below (#3741):

  Assertion failed: current_task->waiting_for == NULL
  server panic: Aborting on internal failure, file thread.c, line 2837

  If a deadlock was detected between two tasks so that one of these
  tasks was signaled, the task being signaled could in some cases
  remain connected to the conflicting task. This could then cause the
  problem to occur due to an out-of-context notification.

* A race condition was fixed that could cause a DBPUT or DBUPDATE
  operation to fail with a -809/1024 status (#3742).

  During a DBPUT or DBUPDATE executed simultaneously with a DBDELETE,
  the database server could temporarily encounter an inconsistent
  state of an automatic master chain head, where the master key was
  found in the index while the corresponding master record did no
  longer exist.

* A race condition was fixed that could cause a wrong date/time
  prefix being written to the database server log file (#3731).


Patch PE80-0903060
------------------

Platforms: All

* An internal memory leak was fixed (#3708). Some memory was not
  correctly released when a new connection was established.
  This may eventually result in memory allocation failures that
  require a re-start of the database server process.


Patch PE80-0903040
------------------

Platforms: All

* A dbutil RENAME DATABASE operation could cause the database
  server to abort with a message like below (#3704):

  Assertion failed: SysCat_LinkAddrEquals ...
  server panic: Aborting on internal failure, file syscat.c, line 1943

* An internal memory leak was fixed (#3708). Some memory was not
  correctly released when closing a connection. This may eventually
  result in memory allocation failures in the database server process
  that require a re-start of the server process.

* In rare cases, a malformed client request or an incomplete tcp/ip
  network packet could cause the database server to abort with a
  message like below (#3705):

  Assertion failed: size != 0
  server panic: Aborting on internal failure, file buffer.c, line 777


Patch PE80-0902091
------------------

Platforms: All

* This patch enables dbutil to change item order (#3689).


Notes / Related patches:

- dbutil patch PE80-0902090 (or superseding) supports changing
  item order.


Patch PE80-0901090
------------------

Platforms: All

* Fixed an internal race condition that could cause a database
  server abort in rare cases when concurrently disconnecting
  multiple database sessions (#3696). A message like below is
  output to the log file:

  Assertion failed: thread_rwlock_destroy failed
  server panic: Aborting on internal failure, file thread.c, line 1815

  The stack trace shows the following call stack:
  (1) thread_rwlock_destroy
  (2) Node_DeleteNodeMempageIfEmpty
  (3) Node_Delete
  (4) Tlog_Destroy
  (5) idb_exit_session

* The dbctl forwardlog status command no longer requires dba
  privileges.


Patch PE80-0812180
------------------

Platforms: All

* During an automatic forward-log file switch it could happen in rare
  cases that transactions were not written to the forward-log (#3694).

  As a consequence, a recovery or replication from this forward-log
  would fail, for example with a message like below:

  recovery failed in action ... page ... not in expected state
  server panic: Fatal problem detected in btree_FWR__verify_page
  Assertion failed: h->lower == data->lower

* A DBGET mode 6 or 16 on an index item could improperly return an
  end-of-chain condition when the last key in the index was deleted
  (#3683).


Installation:
-------------

Please download the patch archive that corresponds with the installed
release.  The patch files follow the conventions below:

   PE80-1109210-hpux-ia64.tar.gz
        ^       ^    ^
        |       |    Architecture / OS specific build
        |       Operating system
        Patch ID


HP-UX:

In order to install this patch, you need to unpack it with gzip and tar.
Gzip is included with HP-UX. Installation requires root privileges.

cd /opt/eloquence/8.0
gzip -dc /path/to/PE80-1109210-hpux.tar.gz | tar xf -

Files:

   bin/eloqdb32 (32 bit database server)
   bin/eloqdb64 (64 bit database server, not available on hpux-pa11)
   share/doc/PE80-1109210-README


Linux:

In order to install this patch, you need to unpack it with tar.
Installation requires root privileges.

cd /opt/eloquence/8.0
tar xzf /path/to/PE80-1109210-linux.tar.gz

Files:

   bin/eloqdb32 (32 bit database server, only available on linux-i686)
   bin/eloqdb64 (64 bit database server, not available on linux-i686)
   share/doc/PE80-1109210-README


Windows:

Two options are available for patch installation. The patch is
available as self extracting archive for automatic installation
and as a zip archive for manual installation. Both patches are
equivalent. Installation requires administrative capabilities.

For automatic installation of this patch, please download the patch
file PE80-1109210-win32.exe. Before installation, please consider
stopping the database server, then execute the patch installation
program. Installation does not require a reboot unless the patched
files were active.

For a manual installation of the patch, please download the patch
file PE80-1109210-win32.zip and unpack its contents. Then perform
the following steps:

* Please make sure the eloqdb service is stopped before installing
  the patch (in the Service Control Manager or with net stop eloqdb).

* Please copy the eloqdb32.exe and eloqdb64.exe files into the
  Eloquence bin directory.
  (Default location: C:\Program Files\Eloquence\8.0\bin)

* Please copy the PE80-1109210-README.txt file into the Eloquence
  share\doc directory.
  (Default location: C:\Program Files\Eloquence\8.0\share\doc)

Files:

   eloqdb32.exe (32 bit database server)
   eloqdb64.exe (64 bit database server)
   PE80-1109210-README.txt