Comment 5 for bug 1206565

The PMP was taken later on, after the database was stuck for over an hour.

DONOR:
set starts around 4:09. However, the logs have been removed from the server, cannot access them anymore.
Then a long time nothing was logged and at the moment the database got stuck (confirmed by customer), we got those 2 errors:

130730 6:03:10 [Note] WSREP: Provider paused at a6280df4-f907-11e2-b79a-3fa52bb11ac5:261230
130730 6:04:40 [ERROR] Threadpool could not create additional thread to handle queries, because the number of allowed threads was reached. Increasing 'thread_pool_max_threads' parameter can help in this situation.
 If 'extra_port' parameter is set, you can still connect to the database with superuser account (it must be TCP connection using extra_port as TCP port) and troubleshoot the situation. A likely cause of pool blocks are clients that lock resources for long time. 'show
processlist' or 'show engine innodb status' can give additional hints.
130730 6:04:40 [Note] Threadpool has been blocked for 30 seconds

JOINER:
130730 04:09:52 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
130730 04:09:52 mysqld_safe Skipping wsrep-recover for empty datadir: /var/lib/mysql
130730 04:09:52 mysqld_safe Assigning 00000000-0000-0000-0000-000000000000:-1 to wsrep_start_position
130730 4:09:52 [Note] WSREP: wsrep_start_position var submitted: '00000000-0000-0000-0000-000000000000:-1'
130730 4:09:52 [ERROR] An old style --language value with language specific part detected: /usr/share/mysql/english/
130730 4:09:52 [ERROR] Use --lc-messages-dir without language specific part instead.
130730 4:09:52 [Note] WSREP: Read nil XID from storage engines, skipping position init
130730 4:09:52 [Note] WSREP: wsrep_load(): loading provider library '/usr/lib/libgalera_smm.so'
130730 4:09:52 [Note] WSREP: wsrep_load(): Galera 2.5(r150) by Codership Oy <email address hidden> loaded succesfully.
130730 4:09:52 [Note] WSREP: Found saved state: cfa1bbe6-ad61-11e2-0800-ddbec9296193:1136915979
130730 4:09:52 [Note] WSREP: Reusing existing '/var/lib/mysql//galera.cache'.
130730 4:09:52 [Note] WSREP: Passing config to GCS: base_host = 192.168.20.122; base_port = 4567; cert.log_conflicts = no; gcache.dir = /var/lib/mysql/; gcache.keep_pages_size = 0; gcache.mem_size = 0; gcache.name = /var/lib/mysql//galera.cache; gcache.page_size = 128M; gcache.size = 2G; gcs.fc_debug = 0; gcs.fc_factor = 0.99; gcs.fc_limit = 256; gcs.fc_master_slave = yes; gcs.max_packet_size = 64500; gcs.max_throttle = 0.25; gcs.recv_q_hard_limit = 9223372036854775807; gcs.recv_q_soft_limit = 0.25; gcs.sync_donor = NO; replicator.causal_read_timeout = PT30S; replicator.commit_order = 3
130730 4:09:52 [Note] WSREP: Assign initial position for certification: 1136915979, protocol version: -1
130730 4:09:52 [Note] WSREP: wsrep_sst_grab()
130730 4:09:52 [Note] WSREP: Start replication
130730 4:09:52 [Note] WSREP: Setting initial position to cfa1bbe6-ad61-11e2-0800-ddbec9296193:1136915979
130730 4:09:52 [Note] WSREP: protonet asio version 0
130730 4:09:52 [Note] WSREP: backend: asio
130730 4:09:52 [Note] WSREP: GMCast version 0
130730 4:09:52 [Note] WSREP: (8e9245e4-f908-11e2-0800-b18be9f1839f, 'tcp://0.0.0.0:4567') listening at tcp://0.0.0.0:4567
130730 4:09:52 [Note] WSREP: (8e9245e4-f908-11e2-0800-b18be9f1839f, 'tcp://0.0.0.0:4567') multicast: , ttl: 1
130730 4:09:52 [Note] WSREP: EVS version 0
130730 4:09:52 [Note] WSREP: PC version 0
130730 4:09:52 [Note] WSREP: gcomm: connecting to group 'Production-XtraDB-Cluster', peer '192.168.20.121:,192.168.20.122:,192.168.20.120:'
130730 4:09:52 [Warning] WSREP: (8e9245e4-f908-11e2-0800-b18be9f1839f, 'tcp://0.0.0.0:4567') address 'tcp://192.168.20.122:4567' points to own listening address, blacklisting
130730 4:09:52 [Note] WSREP: (8e9245e4-f908-11e2-0800-b18be9f1839f, 'tcp://0.0.0.0:4567') address 'tcp://192.168.20.122:4567' pointing to uuid 8e9245e4-f908-11e2-0800-b18be9f1839f is blacklisted, skipping
130730 4:09:52 [Note] WSREP: declaring a6277ce6-f907-11e2-a7d9-77ba0c38d3c4 stable
130730 4:09:52 [Note] WSREP: Node a6277ce6-f907-11e2-a7d9-77ba0c38d3c4 state prim
130730 4:09:52 [Note] WSREP: view(view_id(PRIM,8e9245e4-f908-11e2-0800-b18be9f1839f,16) memb {
        8e9245e4-f908-11e2-0800-b18be9f1839f,
        a6277ce6-f907-11e2-a7d9-77ba0c38d3c4,
} joined {
} left {
} partitioned {
})
130730 4:09:52 [Note] WSREP: discarding pending addr without UUID: tcp://192.168.20.120:4567
130730 4:09:53 [Note] WSREP: gcomm: connected
130730 4:09:53 [Note] WSREP: Changing maximum packet size to 64500, resulting msg size: 32636
130730 4:09:53 [Note] WSREP: Shifting CLOSED -> OPEN (TO: 0)
130730 4:09:53 [Note] WSREP: Opened channel 'Production-XtraDB-Cluster'
130730 4:09:53 [Note] WSREP: New COMPONENT: primary = yes, bootstrap = no, my_idx = 0, memb_num = 2
130730 4:09:53 [Note] WSREP: Waiting for SST to complete.
130730 4:09:53 [Note] WSREP: STATE_EXCHANGE: sent state UUID: 8f2b72c8-f908-11e2-0800-645981eab011
130730 4:09:53 [Note] WSREP: STATE EXCHANGE: sent state msg: 8f2b72c8-f908-11e2-0800-645981eab011
130730 4:09:53 [Note] WSREP: STATE EXCHANGE: got state msg: 8f2b72c8-f908-11e2-0800-645981eab011 from 0 (DB3)
130730 4:09:53 [Note] WSREP: STATE EXCHANGE: got state msg: 8f2b72c8-f908-11e2-0800-645981eab011 from 1 (DB2)
130730 4:09:53 [Note] WSREP: Quorum results:
        version = 2,
        component = PRIMARY,
        conf_id = 3,
        members = 1/2 (joined/total),
        act_id = 3582,
        last_appl. = -1,
        protocols = 0/4/2 (gcs/repl/appl),
        group UUID = a6280df4-f907-11e2-b79a-3fa52bb11ac5
130730 4:09:53 [Note] WSREP: Flow-control interval: [253, 256]
130730 4:09:53 [Note] WSREP: Shifting OPEN -> PRIMARY (TO: 3582)
130730 4:09:53 [Note] WSREP: State transfer required:
        Group state: a6280df4-f907-11e2-b79a-3fa52bb11ac5:3582
        Local state: cfa1bbe6-ad61-11e2-0800-ddbec9296193:1136915979
130730 4:09:53 [Note] WSREP: New cluster view: global state: a6280df4-f907-11e2-b79a-3fa52bb11ac5:3582, view# 4: Primary, number of nodes: 2, my index: 0, protocol version 2
130730 4:09:53 [Warning] WSREP: Gap in state sequence. Need state transfer.
130730 4:09:55 [Note] WSREP: Running: 'wsrep_sst_xtrabackup --role 'joiner' --address '192.168.20.122' --auth 'user:pass' --datadir '/var/lib/mysql/' --defaults-file '/etc/mysql/my.cnf' --parent '39743''
WSREP_SST: [INFO] Streaming with tar (20130730 04:09:55.183)
WSREP_SST: [INFO] Note: Advanced xtrabackup features - encryption,compression etc. not available with tar. (20130730 04:09:55.186)
WSREP_SST: [INFO] However, xbstream requires manual cleanup of data directory before SST - lp:1193240. (20130730 04:09:55.189)
130730 4:09:55 [Note] WSREP: Prepared SST request: xtrabackup|192.168.20.122:4444/xtrabackup_sst
130730 4:09:55 [Note] WSREP: wsrep_notify_cmd is not defined, skipping notification.
130730 4:09:55 [Warning] WSREP: moving position backwards: 1136915979 -> 3582
130730 4:09:55 [Note] WSREP: Assign initial position for certification: 3582, protocol version: 2
130730 4:09:55 [Warning] WSREP: Failed to prepare for incremental state transfer: Local state UUID (cfa1bbe6-ad61-11e2-0800-ddbec9296193) does not match group state UUID (a6280df4-f907-11e2-b79a-3fa52bb11ac5): 1 (Operation not permitted)
         at galera/src/replicator_str.cpp:prepare_for_IST():436. IST will be unavailable.
130730 4:09:55 [Note] WSREP: Node 0 (DB3) requested state transfer from '*any*'. Selected 1 (DB2)(SYNCED) as donor.
130730 4:09:55 [Note] WSREP: Shifting PRIMARY -> JOINER (TO: 3582)
130730 4:09:55 [Note] WSREP: Requesting state transfer: success, donor: 1

Nothing after that, and not at 6AM when the master got stuck.