This file is indexed.

/usr/bin/wsrep_sst_xtrabackup is in percona-xtradb-cluster-server-5.5 5.5.34-25.9+dfsg-0ubuntu4.

This file is owned by root:root, with mode 0o755.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
#!/bin/bash -ue
# Copyright (C) 2013 Percona Inc
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; see the file COPYING. If not, write to the
# Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston
# MA  02110-1301  USA.

# Optional dependencies and options documented here: http://www.percona.com/doc/percona-xtradb-cluster/manual/xtrabackup_sst.html 
# Make sure to read that before proceeding!




. $(dirname $0)/wsrep_sst_common

ealgo=""
ekey=""
ekeyfile=""
encrypt=0
nproc=1
ecode=0
XTRABACKUP_PID=""
SST_PORT=""
REMOTEIP=""
tcert=""
tpem=""
sockopt=""
progress=""
ttime=0
totime=0
lsn=""
incremental=0
ecmd=""
rlimit=""

sfmt="tar"
strmcmd=""
tfmt=""
tcmd=""
rebuild=0
rebuildcmd=""
payload=0
pvformat="-F '%N => Rate:%r Avg:%a Elapsed:%t %e Bytes: %b %p' "
pvopts="-f  -i 10 -N $WSREP_SST_OPT_ROLE "
uextra=0

if which pv &>/dev/null && pv --help | grep -q FORMAT;then 
    pvopts+=$pvformat
fi
pcmd="pv $pvopts"
declare -a RC

INNOBACKUPEX_BIN=innobackupex
readonly AUTH=(${WSREP_SST_OPT_AUTH//:/ })
DATA="${WSREP_SST_OPT_DATA}"
INFO_FILE="xtrabackup_galera_info"
IST_FILE="xtrabackup_ist"
MAGIC_FILE="${DATA}/${INFO_FILE}"

# Setting the path for ss and ip
export PATH="/usr/sbin:/sbin:$PATH"

timeit(){
    local stage=$1
    shift
    local cmd="$@"
    local x1 x2 took extcode

    if [[ $ttime -eq 1 ]];then 
        x1=$(date +%s)
        wsrep_log_info "Evaluating $cmd"
        eval "$cmd"
        extcode=$?
        x2=$(date +%s)
        took=$(( x2-x1 ))
        wsrep_log_info "NOTE: $stage took $took seconds"
        totime=$(( totime+took ))
    else 
        wsrep_log_info "Evaluating $cmd"
        eval "$cmd"
        extcode=$?
    fi
    return $extcode
}

get_keys()
{
    if [[ $encrypt -eq 2 ]];then 
        return 
    fi

    if [[ $encrypt -eq 0 ]];then 
        if my_print_defaults -c $WSREP_SST_OPT_CONF xtrabackup | grep -q encrypt;then
            wsrep_log_error "Unexpected option combination. SST may fail. Refer to http://www.percona.com/doc/percona-xtradb-cluster/manual/xtrabackup_sst.html "
        fi
        return
    fi

    if [[ $sfmt == 'tar' ]];then
        wsrep_log_info "NOTE: Xtrabackup-based encryption - encrypt=1 - cannot be enabled with tar format"
        encrypt=0
        return
    fi

    wsrep_log_info "Xtrabackup based encryption enabled in my.cnf - Supported only from Xtrabackup 2.1.4"

    if [[ -z $ealgo ]];then
        wsrep_log_error "FATAL: Encryption algorithm empty from my.cnf, bailing out"
        exit 3
    fi

    if [[ -z $ekey && ! -r $ekeyfile ]];then
        wsrep_log_error "FATAL: Either key or keyfile must be readable"
        exit 3
    fi

    if [[ -z $ekey ]];then
        ecmd="xbcrypt --encrypt-algo=$ealgo --encrypt-key-file=$ekeyfile"
    else
        ecmd="xbcrypt --encrypt-algo=$ealgo --encrypt-key=$ekey"
    fi

    if [[ "$WSREP_SST_OPT_ROLE" == "joiner" ]];then
        ecmd+=" -d"
    fi
}

get_transfer()
{
    if [[ -z $SST_PORT ]];then 
        TSST_PORT=4444
    else 
        TSST_PORT=$SST_PORT
    fi

    if [[ $tfmt == 'nc' ]];then
        if [[ ! -x `which nc` ]];then 
            wsrep_log_error "nc(netcat) not found in path: $PATH"
            exit 2
        fi
        wsrep_log_info "Using netcat as streamer"
        if [[ "$WSREP_SST_OPT_ROLE"  == "joiner" ]];then
            tcmd="nc -dl ${TSST_PORT}"
        else
            tcmd="nc ${REMOTEIP} ${TSST_PORT}"
        fi
    else
        tfmt='socat'
        wsrep_log_info "Using socat as streamer"
        if [[ ! -x `which socat` ]];then 
            wsrep_log_error "socat not found in path: $PATH"
            exit 2
        fi

        if [[ $encrypt -eq 2 ]] && ! socat -V | grep -q OPENSSL;then 
            wsrep_log_info "NOTE: socat is not openssl enabled, falling back to plain transfer"
            encrypt=0
        fi

        if [[ $encrypt -eq 2 ]];then 
            wsrep_log_info "Using openssl based encryption with socat"
            if [[ -z $tpem || -z $tcert ]];then 
                wsrep_log_error "Both PEM and CRT files required"
                exit 22
            fi
            if [[ "$WSREP_SST_OPT_ROLE"  == "joiner" ]];then
                wsrep_log_info "Decrypting with PEM $tpem, CA: $tcert"
                tcmd="socat -u openssl-listen:${TSST_PORT},reuseaddr,cert=$tpem,cafile=${tcert}${sockopt} stdio"
            else
                wsrep_log_info "Encrypting with PEM $tpem, CA: $tcert"
                tcmd="socat -u stdio openssl-connect:${REMOTEIP}:${TSST_PORT},cert=$tpem,cafile=${tcert}${sockopt}"
            fi
        else 
            if [[ "$WSREP_SST_OPT_ROLE"  == "joiner" ]];then
                tcmd="socat -u TCP-LISTEN:${TSST_PORT},reuseaddr${sockopt} stdio"
            else
                tcmd="socat -u stdio TCP:${REMOTEIP}:${TSST_PORT}${sockopt}"
            fi
        fi
    fi

}

parse_cnf()
{
    local group=$1
    local var=$2
    reval=$(my_print_defaults -c $WSREP_SST_OPT_CONF $group | awk -F= '{if ($1 ~ /_/) { gsub(/_/,"-",$1); print $1"="$2 } else { print $0 }}' | grep -- "--$var=" | cut -d= -f2-)
    if [[ -z $reval ]];then 
        [[ -n $3 ]] && reval=$3
    fi
    echo $reval
}

get_footprint()
{
    pushd $WSREP_SST_OPT_DATA 1>/dev/null
    payload=$(du --block-size=1 -c  **/*.ibd **/*.MYI **/*.MYI ibdata1  | awk 'END { print $1 }')
    if my_print_defaults -c $WSREP_SST_OPT_CONF xtrabackup | grep -q -- "--compress";then 
        # QuickLZ has around 50% compression ratio
        # When compression/compaction used, the progress is only an approximate.
        payload=$(( payload*1/2 ))
    fi
    popd 1>/dev/null
    pcmd+=" -s $payload"
    adjust_progress
}

adjust_progress()
{
    if [[ -n $progress && $progress != '1' ]];then 
        if [[ -e $progress ]];then 
            pcmd+=" 2>>$progress"
        else 
            pcmd+=" 2>$progress"
        fi
    elif [[ -z $progress && -n $rlimit  ]];then 
            # When rlimit is non-zero
            pcmd="pv -q"
    fi 

    if [[ -n $rlimit && "$WSREP_SST_OPT_ROLE"  == "donor" ]];then
        wsrep_log_info "Rate-limiting SST to $rlimit"
        pcmd+=" -L \$rlimit"
    fi
}

read_cnf()
{
    sfmt=$(parse_cnf sst streamfmt "tar")
    tfmt=$(parse_cnf sst transferfmt "socat")
    tcert=$(parse_cnf sst tca "")
    tpem=$(parse_cnf sst tcert "")
    encrypt=$(parse_cnf sst encrypt 0)
    sockopt=$(parse_cnf sst sockopt "")
    progress=$(parse_cnf sst progress "")
    rebuild=$(parse_cnf sst rebuild 0)
    ttime=$(parse_cnf sst time 0)
    incremental=$(parse_cnf sst incremental 0)
    ealgo=$(parse_cnf xtrabackup encrypt "")
    ekey=$(parse_cnf xtrabackup encrypt-key "")
    ekeyfile=$(parse_cnf xtrabackup encrypt-key-file "")

    # Refer to http://www.percona.com/doc/percona-xtradb-cluster/manual/xtrabackup_sst.html 
    if [[ -z $ealgo ]];then
        ealgo=$(parse_cnf sst encrypt-algo "")
        ekey=$(parse_cnf sst encrypt-key "")
        ekeyfile=$(parse_cnf sst encrypt-key-file "")
    fi
    rlimit=$(parse_cnf sst rlimit "")
    uextra=$(parse_cnf sst use_extra 0)
}

get_stream()
{
    if [[ $sfmt == 'xbstream' ]];then 
        wsrep_log_info "Streaming with xbstream"
        if [[ "$WSREP_SST_OPT_ROLE"  == "joiner" ]];then
            strmcmd="xbstream -x"
        else
            strmcmd="xbstream -c \${INFO_FILE} \${IST_FILE}"
        fi
    else
        sfmt="tar"
        wsrep_log_info "Streaming with tar"
        if [[ "$WSREP_SST_OPT_ROLE"  == "joiner" ]];then
            strmcmd="tar xfi - --recursive-unlink -h"
        else
            strmcmd="tar cf - \${INFO_FILE} \${IST_FILE}"
        fi

    fi
}

get_proc()
{
    set +e
    nproc=$(grep -c processor /proc/cpuinfo)
    [[ -z $nproc || $nproc -eq 0 ]] && nproc=1
    set -e
}

sig_joiner_cleanup()
{
    wsrep_log_error "Removing $MAGIC_FILE file due to signal"
    rm -f "$MAGIC_FILE"
}

cleanup_joiner()
{
    # Since this is invoked just after exit NNN
    local estatus=$?
    if [[ $estatus -ne 0 ]];then 
        wsrep_log_error "Cleanup after exit with status:$estatus"
    fi
    if [ "${WSREP_SST_OPT_ROLE}" = "joiner" ];then
        wsrep_log_info "Removing the sst_in_progress file"
        wsrep_cleanup_progress_file
    fi
    if [[ -n $progress && -p $progress ]];then 
        wsrep_log_info "Cleaning up fifo file $progress"
        rm $progress
    fi
}

check_pid()
{
    local pid_file="$1"
    [ -r "$pid_file" ] && ps -p $(cat "$pid_file") >/dev/null 2>&1
}

cleanup_donor()
{
    # Since this is invoked just after exit NNN
    local estatus=$?
    if [[ $estatus -ne 0 ]];then 
        wsrep_log_error "Cleanup after exit with status:$estatus"
    fi

    if [[ -n $XTRABACKUP_PID ]];then 
        if check_pid $XTRABACKUP_PID
        then
            wsrep_log_error "xtrabackup process is still running. Killing... "
            kill_xtrabackup
        fi

        rm -f $XTRABACKUP_PID 
    fi
    rm -f ${DATA}/${IST_FILE}

    if [[ -n $progress && -p $progress ]];then 
        wsrep_log_info "Cleaning up fifo file $progress"
        rm $progress
    fi
}

kill_xtrabackup()
{
    local PID=$(cat $XTRABACKUP_PID)
    [ -n "$PID" -a "0" != "$PID" ] && kill $PID && (kill $PID && kill -9 $PID) || :
    rm -f "$XTRABACKUP_PID"
}

setup_ports()
{
    if [[ "$WSREP_SST_OPT_ROLE"  == "donor" ]];then
        SST_PORT=$(echo $WSREP_SST_OPT_ADDR | awk -F '[:/]' '{ print $2 }')
        REMOTEIP=$(echo $WSREP_SST_OPT_ADDR | awk -F ':' '{ print $1 }')
        lsn=$(echo $WSREP_SST_OPT_ADDR | awk -F '[:/]' '{ print $4 }')
    else
        SST_PORT=$(echo ${WSREP_SST_OPT_ADDR} | awk -F ':' '{ print $2 }')
    fi
}

# waits ~10 seconds for nc to open the port and then reports ready
# (regardless of timeout)
wait_for_listen()
{
    local PORT=$1
    local ADDR=$2
    local MODULE=$3
    for i in {1..50}
    do
        ss -p state listening "( sport = :$PORT )" | grep -qE 'socat|nc' && break
        sleep 0.2
    done
    if [[ $incremental -eq 1 ]];then 
        echo "ready ${ADDR}/${MODULE}/$lsn"
    else 
    echo "ready ${ADDR}/${MODULE}"
    fi
}

check_extra()
{
    if [[ $uextra -eq 1 ]];then 
        if my_print_defaults -c $WSREP_SST_OPT_CONF mysqld | tr '_' '-' | grep -- "--thread-handling=" | grep -q 'pool-of-threads';then 
            local eport=$(my_print_defaults -c $WSREP_SST_OPT_CONF mysqld | tr '_' '-' | grep -- "--extra-port=" | cut -d= -f2)
            if [[ -n $eport ]];then 
                # Xtrabackup works only locally.
                # Hence, setting host to 127.0.0.1 unconditionally. 
                wsrep_log_info "SST through extra_port $eport"
                INNOEXTRA+=" --host=127.0.0.1 --port=$eport "
            else 
                wsrep_log_error "Extra port $eport null, failing"
                exit 1
            fi
        else 
            wsrep_log_info "Thread pool not set, ignore the option use_extra"
        fi
    fi
}

if [[ ! -x `which innobackupex` ]];then 
    wsrep_log_error "innobackupex not in path: $PATH"
    exit 2
fi

rm -f "${MAGIC_FILE}"

if [[ ! ${WSREP_SST_OPT_ROLE} == 'joiner' && ! ${WSREP_SST_OPT_ROLE} == 'donor' ]];then 
    wsrep_log_error "Invalid role ${WSREP_SST_OPT_ROLE}"
    exit 22
fi

read_cnf
setup_ports
get_stream
get_transfer

INNOEXTRA=""
INNOAPPLY="${INNOBACKUPEX_BIN} --defaults-file=${WSREP_SST_OPT_CONF} --apply-log \$rebuildcmd \${DATA} &>\${DATA}/innobackup.prepare.log"
INNOBACKUP="${INNOBACKUPEX_BIN} --defaults-file=${WSREP_SST_OPT_CONF} \$INNOEXTRA --galera-info --stream=\$sfmt \${TMPDIR} 2>\${DATA}/innobackup.backup.log"

if [ "$WSREP_SST_OPT_ROLE" = "donor" ]
then
    trap cleanup_donor EXIT

    if [ $WSREP_SST_OPT_BYPASS -eq 0 ]
    then
        TMPDIR="${TMPDIR:-/tmp}"

        if [ "${AUTH[0]}" != "(null)" ]; then
           INNOEXTRA+=" --user=${AUTH[0]}"
       fi

        if [ ${#AUTH[*]} -eq 2 ]; then
           INNOEXTRA+=" --password=${AUTH[1]}"
        elif [ "${AUTH[0]}" != "(null)" ]; then
           # Empty password, used for testing, debugging etc.
           INNOEXTRA+=" --password="
        fi

        get_keys
        if [[ $encrypt -eq 1 ]];then
            if [[ -n $ekey ]];then
                INNOEXTRA+=" --encrypt=$ealgo --encrypt-key=$ekey "
            else 
                INNOEXTRA+=" --encrypt=$ealgo --encrypt-key-file=$ekeyfile "
            fi
        fi

        if [[ -n $lsn ]];then 
                INNOEXTRA+=" --incremental --incremental-lsn=$lsn "
        fi

        check_extra

        wsrep_log_info "Streaming the backup to joiner at ${REMOTEIP} ${SST_PORT}"

        if [[ -n $progress ]];then 
            get_footprint
            tcmd="$pcmd | $tcmd"
        elif [[ -n $rlimit ]];then 
            adjust_progress
            tcmd="$pcmd | $tcmd"
        fi

        set +e
        timeit "Donor-Transfer" "$INNOBACKUP | $tcmd; RC=( "\${PIPESTATUS[@]}" )"
        set -e

        if [ ${RC[0]} -ne 0 ]; then
          wsrep_log_error "${INNOBACKUPEX_BIN} finished with error: ${RC[0]}. " \
                          "Check ${DATA}/innobackup.backup.log"
          exit 22
        elif [[ ${RC[$(( ${#RC[@]}-1 ))]} -eq 1 ]];then 
          wsrep_log_error "$tcmd finished with error: ${RC[1]}"
          exit 22
        fi

        # innobackupex implicitly writes PID to fixed location in ${TMPDIR}
        XTRABACKUP_PID="${TMPDIR}/xtrabackup_pid"


    else # BYPASS FOR IST

        wsrep_log_info "Bypassing the SST for IST"
        STATE="${WSREP_SST_OPT_GTID}"
        echo "continue" # now server can resume updating data
        echo "${STATE}" > "${MAGIC_FILE}"
        echo "1" > "${DATA}/${IST_FILE}"
        get_keys
        pushd ${DATA} 1>/dev/null
        set +e
        if [[ $encrypt -eq 1 ]];then
            tcmd=" $ecmd | $tcmd"
        fi
        timeit "Donor-IST-Unencrypted-transfer" "$strmcmd | $tcmd; RC=( "\${PIPESTATUS[@]}" )"
        set -e
        popd 1>/dev/null

        for ecode in "${RC[@]}";do 
            if [[ $ecode -ne 0 ]];then 
                wsrep_log_error "Error while streaming data to joiner node: " \
                                "exit codes: ${RC[@]}"
                exit 1
            fi
        done
    fi

    echo "done ${WSREP_SST_OPT_GTID}"
    wsrep_log_info "Total time on donor: $totime seconds"

elif [ "${WSREP_SST_OPT_ROLE}" = "joiner" ]
then
    [[ -e $SST_PROGRESS_FILE ]] && wsrep_log_info "Stale sst_in_progress file: $SST_PROGRESS_FILE"
    touch $SST_PROGRESS_FILE

    if [[ ! -e ${DATA}/ibdata1 ]];then 
        incremental=0
    fi

    if [[ $incremental -eq 1 ]];then 
        wsrep_log_info "Incremental SST enabled"
        #lsn=$(/pxc/bin/mysqld --defaults-file=$WSREP_SST_OPT_CONF  --basedir=/pxc  --wsrep-recover 2>&1 | grep -o 'log sequence number .*' | cut -d " " -f 4 | head -1)
        lsn=$(grep to_lsn xtrabackup_checkpoints | cut -d= -f2 | tr -d ' ')
        wsrep_log_info "Recovered LSN: $lsn"
    fi

    sencrypted=1
    nthreads=1

    MODULE="xtrabackup_sst"

    # May need xtrabackup_checkpoints later on
    rm -f ${DATA}/xtrabackup_binary ${DATA}/xtrabackup_galera_info  ${DATA}/xtrabackup_logfile

    ADDR=${WSREP_SST_OPT_ADDR}
    if [ -z "${SST_PORT}" ]
    then
        SST_PORT=4444
        ADDR="$(echo ${WSREP_SST_OPT_ADDR} | awk -F ':' '{ print $1 }'):${SST_PORT}"
    fi

    wait_for_listen ${SST_PORT} ${ADDR} ${MODULE} &

    trap sig_joiner_cleanup HUP PIPE INT TERM
    trap cleanup_joiner EXIT

    if [[ -n $progress ]];then 
        adjust_progress
        tcmd+=" | $pcmd"
    fi

    if [[ $incremental -eq 1 ]];then 
        BDATA=$DATA
        DATA=$(mktemp -d)
        MAGIC_FILE="${DATA}/${INFO_FILE}"
    fi

    get_keys
    set +e
    if [[ $encrypt -eq 1 && $sencrypted -eq 1 ]];then
        strmcmd=" $ecmd | $strmcmd"
    fi

    pushd ${DATA} 1>/dev/null
    timeit "Joiner-Recv-Unencrypted" "$tcmd | $strmcmd; RC=( "\${PIPESTATUS[@]}" )"
    popd 1>/dev/null 

    set -e

    if [[ $sfmt == 'xbstream' ]];then 
        # Special handling till lp:1193240 is fixed"
        if [[ ${RC[$(( ${#RC[@]}-1 ))]} -eq 1 ]];then 
            wsrep_log_error "Xbstream failed"
            wsrep_log_error "Data directory ${DATA} may not be empty: lp:1193240" \
                            "Manual intervention required in that case"
            exit 32
        fi
    fi

    wait %% # join for wait_for_listen thread

    for ecode in "${RC[@]}";do 
        if [[ $ecode -ne 0 ]];then 
            wsrep_log_error "Error while getting data from donor node: " \
                            "exit codes: ${RC[@]}"
            exit 32
        fi
    done

    if [ ! -r "${MAGIC_FILE}" ]
    then
        # this message should cause joiner to abort
        wsrep_log_error "xtrabackup process ended without creating '${MAGIC_FILE}'"
        wsrep_log_info "Contents of datadir" 
        wsrep_log_info "$(ls -l ${DATA}/**/*)"
        exit 32
    fi

    if ! ps -p ${WSREP_SST_OPT_PARENT} &>/dev/null
    then
        wsrep_log_error "Parent mysqld process (PID:${WSREP_SST_OPT_PARENT}) terminated unexpectedly." 
        exit 32
    fi

    if [ ! -r "${DATA}/${IST_FILE}" ]
    then
        wsrep_log_info "Proceeding with SST"
        wsrep_log_info "Removing existing ib_logfile files"
        if [[ $incremental -ne 1 ]];then 
            rm -f ${DATA}/ib_logfile*
        else
            rm -f ${BDATA}/ib_logfile*
        fi

        get_proc

        # Rebuild indexes for compact backups
        if grep -q 'compact = 1' ${DATA}/xtrabackup_checkpoints;then 
            wsrep_log_info "Index compaction detected"
            rebuild=1
        fi

        if [[ $rebuild -eq 1 ]];then 
            nthreads=$(parse_cnf xtrabackup rebuild-threads $nproc)
            wsrep_log_info "Rebuilding during prepare with $nthreads threads"
            rebuildcmd="--rebuild-indexes --rebuild-threads=$nthreads"
        fi

        if test -n "$(find ${DATA} -maxdepth 1 -type f -name '*.qp' -print -quit)";then

            wsrep_log_info "Compressed qpress files found"

            if [[ ! -x `which qpress` ]];then 
                wsrep_log_error "qpress not found in path: $PATH"
                exit 22
            fi

            if [[ -n $progress ]] && pv --help | grep -q 'line-mode';then
                count=$(find ${DATA} -type f -name '*.qp' | wc -l)
                count=$(( count*2 ))
                if pv --help | grep -q FORMAT;then 
                    pvopts="-f -s $count -l -N Decompression -F '%N => Rate:%r Elapsed:%t %e Progress: [%b/$count]'"
                else 
                    pvopts="-f -s $count -l -N Decompression"
                fi
                pcmd="pv $pvopts"
                adjust_progress
                dcmd="$pcmd | xargs -n 2 qpress -T${nproc}d"
            else 
                dcmd="xargs -n 2 qpress -T${nproc}d"
            fi

            wsrep_log_info "Removing existing ibdata1 file"
            rm -f ${DATA}/ibdata1

            # Decompress the qpress files 
            wsrep_log_info "Decompression with $nproc threads"
            timeit "Decompression" "find ${DATA} -type f -name '*.qp' -printf '%p\n%h\n' | $dcmd"
            extcode=$?

            if [[ $extcode -eq 0 ]];then
                wsrep_log_info "Removing qpress files after decompression"
                find ${DATA} -type f -name '*.qp' -delete 
                if [[ $? -ne 0 ]];then 
                    wsrep_log_error "Something went wrong with deletion of qpress files. Investigate"
                fi
            else
                wsrep_log_error "Decompression failed. Exit code: $extcode"
                exit 22
            fi
        fi

        if [[ $incremental -eq 1 ]];then 
            # Added --ibbackup=xtrabackup_55 because it fails otherwise citing connection issues.
            INNOAPPLY="${INNOBACKUPEX_BIN} --defaults-file=${WSREP_SST_OPT_CONF} \
                --ibbackup=xtrabackup_55 --apply-log $rebuildcmd --redo-only $BDATA --incremental-dir=${DATA} &>>${BDATA}/innobackup.prepare.log"
        fi

        wsrep_log_info "Preparing the backup at ${DATA}"
        timeit "Xtrabackup prepare stage" "$INNOAPPLY"

        if [[ $incremental -eq 1 ]];then 
            wsrep_log_info "Cleaning up ${DATA} after incremental SST"
            [[ -d ${DATA} ]] && rm -rf ${DATA}
            DATA=$BDATA
        fi

        if [ $? -ne 0 ];
        then
            wsrep_log_error "${INNOBACKUPEX_BIN} finished with errors. Check ${DATA}/innobackup.prepare.log" 
            exit 22
        fi
    else 
        wsrep_log_info "${IST_FILE} received from donor: Running IST"
    fi

    cat "${MAGIC_FILE}" # output UUID:seqno
    wsrep_log_info "Total time on joiner: $totime seconds"
fi

exit 0