Patch provided by Wen Heping in PR 43628.
Changes:
* Fix handling failover when health_check was disabled. (Yoshiyuki)
- The bug was introduced in 3.4.
* Fix deadlock while processing Parse message. (Yoshiyuki)
* Add new "replicate_select" directive, being the default value to
be false. (Yoshiyuki)
- If it is true, SELECT query is replicated. This behavior is
same as V3.2 or earlier.
* Improve signal handling. (Yoshiyuki)
- Occasionaly, zombie processes were remained. Or processes were
unstable.
* Fix hang up when SELECT was error inside a transaction
block. The bug was introduced in V3.3. (Yoshiyuki)
* Fix PREPARE/EXECUTE handling in master slave mode. (Yoshiyuki)
* Fix "kind mismatch error" when deadlock error
* Fix hang up and SEGV in extended query protocol when a warning
SQL like "SELECT '\'';" executed. (Yoshiyuki)
* Fix memory leak when connection cache was full. (Yoshiyuki)
* Improve replication. SELECT nextval() and SELECT setval() are
now replicated. (Yoshiyuki)
* Change SELECT query is only sent to the master node. (Yoshiyuki)
- Use /*REPLICATION*/ comment to repliate a SELECT query.
* Fix unexpected failover error due to receiving an interrupt
signal while connecting to the backend. (Yoshiyuki)
* Fix "ps" output to follow PostgreSQL's output. (Taiki)
* Change the default value for enable_pool_hba to true. (Taiki)
* Add "pgpool.pam" file, for PAM configuration file, to be
installed under "$PREFIX/share/". (Taiki)
* Support HBA authentication(Taiki)
* Support log_connections(Taiki)
* Support log_hostname(Tatsuo)
* Show pgpool status in ps command(Tatsuo)
* Fix bug with prepared query(Yoshiyuki)
* Detach secondary server when "kind mismatch error" is detected(Tatsuo)
* Re-open socket if it was closed by backend while reusing
connection(Yoshiyuki)
* Allow 0 weight(Tatsuo)
* Return correct error messaes when pg_hba.conf auth fails. Patch
contributed by Kenji Kikuchi
* Fix kind mismatch errors with COPY FROM STDIN(Yoshiyuki)
* Allow load balancing with extended protocol(Yoshiyuki)
* Fix LISTEN/NOTIFY bug in master/slave mode reported by Michael
Ulitskiy (Tatsuo)
* Improve documentation. patches contributed by Mark Stosberg
* Fix "kind is 0!" error in Execute(). Reads messages until
receiving CommandComplete, EmptyQuery, ErrorResponse or
PortalSuspend in Execute() (Yoshiyuki)
* Add log_statement option. patches contributed by Thomas E
Lackey, modifications and documents by Tatsuo
* In SimpleForwardToFrontend() do not send SYNC and wait for ready for
query when PANIC or FATAL error occurs. In this case the backend
closes the communication channel immediately which will cause unwanted
failover/degeneration by, for example, trying to connect to
invalid database (Tatsuo)
* Fix dealock problem in extended modd by calling synchronize() in
Execute if replication_strict is enabled (Yoshiyuki)
* Fix segfault problem in race conditions among
connection_life_time, child_life_time and child_max_connections
* pgpool does not exit even if pgpool.conf contents is wrong(Tatsuo)
* Fix buffer overrun bug with long health_check_user name(Taiki)
* Fix occasional segfault with replication and load balance
enabled(bug id #1000548)(Tatsuo)
* Fix pool_send_error_message to send properly NULL terminated
string(Yoshiyuki)
* Fix kind mismatch error in SimpleFowardFrontend(Yoshiyuki)
* Enable to build with BSD make(Yoshiyuki)
* Fix pool_debug and friends to block signals while
executing(Tatsuo)
* Fix numerous bugs with extended query(Yoshiyuki)
* Fix INSERT LOCK(Yoshiyuki)
* Do not reuse startup packet(Tatsuo)
* Automatically DEALLOCTE prepared queries when client
disconnects(Yoshiyuki)
* Do not forward packets when length = 0 in
SimpleForwardToFrontend/SimpleForwardToBackend(Tatsuo)
* Fix lost of kind info(Tatsuo)
* Fix bugs with master/slave mode introduced in 2.7.2. per report
from David Boreham (Tatsuo)
* Fix bugs with master/slave and prepared quries. per report
from David Boreham (Tatsuo)
* Changed Copyright to PgPool Global Development Group
* Fix a typo in man page
* PQnotifes() does not receive immediate responses from LISTEN
* NOTIFY emits packet kind does not agree errors in master/slave
mode
* add pgpool man pages(Peter Eisentra)
* Fix bug in show pool_status for ignore_leading_white_space
8c28aaba06