Re: Streaming replication - 11.5

On 3/11/20 11:59 AM, Nicola Contu wrote:
> I am actually cascading.
> The master is in nyh, the first slave is in Dallas and the one having
> problems is in Dallas as well on the same switch of the one replicating
> from the master.
>
> It always worked not sure what is wrong now. We just encrypted disks on
> all servers

Do you have before and after on CPU load, I/O throughput?

Do system logs show anything relevant during replication drop out?

>
>
> Il mer 11 mar 2020, 18:57 Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com
> <mailto:adrian(dot)klaver(at)aklaver(dot)com>> ha scritto:
>
> On 3/11/20 2:54 AM, Nicola Contu wrote:
> > These are the lines before
> >
> > 2020-03-11 09:05:08 GMT [127.0.0.1(40214)] [43853]: [1-1]
> > db=cmdv3,user=zabbix_check ERROR:  recovery is in progress
> > 2020-03-11 09:05:08 GMT [127.0.0.1(40214)] [43853]: [2-1]
> > db=cmdv3,user=zabbix_check HINT:  WAL control functions cannot be
> > executed during recovery.
> > 2020-03-11 09:05:08 GMT [127.0.0.1(40214)] [43853]: [3-1]
> > db=cmdv3,user=zabbix_check STATEMENT:  select
> > greatest(0,pg_wal_lsn_diff(pg_current_wal_lsn(), replay_lsn)) from
> > pg_stat_replication where client_addr ='10.150.20.22'
> >
> > That query is made by Zabbix. So I stopped the zabbix agent and
> tested
> > again. But still failing, because of this now :
> >
> > pg_basebackup: starting background WAL receiver
> > pg_basebackup: created temporary replication slot
> "pg_basebackup_51199"
> > *pg_basebackup: could not receive data from WAL stream: SSL SYSCALL
> > error: EOF detected
> > *^C4699810/504983062 kB (70%), 0/1 tablespace
> > (...ql11/data/base/16401/231363544.2)
>
> So you started over with a pg_basebackup?
>
> Also from below:
>
> 2020-03-11 09:43:53 GMT [10.150.20.22(54906)] [51199]: [1-1]
> db=[unknown],user=replicator LOG:  terminating walsender process due to
> replication timeout
>
> Where are the master and standby in relation to each other network wise?
>
> Intervening firewalls, network latency issues?
>
>
>
> >
> >
> > here the full log starting right before the last try :
> >
> > 2020-03-11 09:22:44 GMT [] [12598]: [4508-1] db=,user= LOG:
> >   restartpoint complete: wrote 19565 buffers (0.2%); 0 WAL file(s)
> > added, 0 removed, 7 recycled; write=270.014 s, sync=0.009 s,
> > total=270.036 s; sync files=804, longest=0.001 s, average=0.000 s;
> > distance=131239 kB, estimate=725998 kB
> > 2020-03-11 09:22:44 GMT [] [12598]: [4509-1] db=,user= LOG:
>  recovery
> > restart point at 643A/D8C05F70
> > 2020-03-11 09:22:44 GMT [] [12598]: [4510-1] db=,user= DETAIL:  Last
> > completed transaction was at log time 2020-03-11 09:22:44.050084+00.
> > 2020-03-11 09:23:14 GMT [] [12598]: [4511-1] db=,user= LOG:
> >   restartpoint starting: time
> > 2020-03-11 09:27:44 GMT [] [12598]: [4512-1] db=,user= LOG:
> >   restartpoint complete: wrote 17069 buffers (0.2%); 0 WAL file(s)
> > added, 0 removed, 17 recycled; write=269.879 s, sync=0.006 s,
> > total=269.902 s; sync files=811, longest=0.001 s, average=0.000 s;
> > distance=120469 kB, estimate=665445 kB
> > 2020-03-11 09:27:44 GMT [] [12598]: [4513-1] db=,user= LOG:
>  recovery
> > restart point at 643A/E01AB438
> > 2020-03-11 09:27:44 GMT [] [12598]: [4514-1] db=,user= DETAIL:  Last
> > completed transaction was at log time 2020-03-11 09:27:43.945485+00.
> > 2020-03-11 09:27:44 GMT [] [12598]: [4515-1] db=,user= LOG:
> >   restartpoint starting: force wait
> > 2020-03-11 09:29:24 GMT [10.222.8.2(47834)] [50961]: [1-1]
> > db=cmdv3,user=nis LOG:  duration: 1402.004 ms  statement: SELECT id,
> > name, parent_id, parent, short_name, sales_rep_id FROM mmx_clients;
> > 2020-03-11 09:29:34 GMT [10.222.8.2(47834)] [50961]: [2-1]
> > db=cmdv3,user=nis LOG:  duration: 9493.259 ms  statement: SELECT
> slid,
> > gnid, sof_id, client_id, product FROM mmx_slids;
> > 2020-03-11 09:32:14 GMT [] [12598]: [4516-1] db=,user= LOG:
> >   restartpoint complete: wrote 71260 buffers (0.8%); 0 WAL file(s)
> > added, 0 removed, 13 recycled; write=269.953 s, sync=0.012 s,
> > total=269.979 s; sync files=760, longest=0.002 s, average=0.000 s;
> > distance=123412 kB, estimate=611242 kB
> > 2020-03-11 09:32:14 GMT [] [12598]: [4517-1] db=,user= LOG:
>  recovery
> > restart point at 643A/E7A30498
> > 2020-03-11 09:32:14 GMT [] [12598]: [4518-1] db=,user= DETAIL:  Last
> > completed transaction was at log time 2020-03-11 09:32:13.916101+00.
> > 2020-03-11 09:32:44 GMT [] [12598]: [4519-1] db=,user= LOG:
> >   restartpoint starting: time
> > 2020-03-11 09:37:14 GMT [] [12598]: [4520-1] db=,user= LOG:
> >   restartpoint complete: wrote 27130 buffers (0.3%); 0 WAL file(s)
> > added, 0 removed, 12 recycled; write=270.026 s, sync=0.007 s,
> > total=270.052 s; sync files=814, longest=0.001 s, average=0.000 s;
> > distance=280595 kB, estimate=578177 kB
> > 2020-03-11 09:37:14 GMT [] [12598]: [4521-1] db=,user= LOG:
>  recovery
> > restart point at 643A/F8C351C8
> > 2020-03-11 09:37:14 GMT [] [12598]: [4522-1] db=,user= DETAIL:  Last
> > completed transaction was at log time 2020-03-11 09:37:14.067443+00.
> > 2020-03-11 09:37:44 GMT [] [12598]: [4523-1] db=,user= LOG:
> >   restartpoint starting: time
> > 2020-03-11 09:42:14 GMT [] [12598]: [4524-1] db=,user= LOG:
> >   restartpoint complete: wrote 26040 buffers (0.3%); 0 WAL file(s)
> > added, 0 removed, 9 recycled; write=269.850 s, sync=0.019 s,
> > total=269.886 s; sync files=834, longest=0.002 s, average=0.000 s;
> > distance=236392 kB, estimate=543999 kB
> > 2020-03-11 09:42:14 GMT [] [12598]: [4525-1] db=,user= LOG:
>  recovery
> > restart point at 643B/730F3F8
> > 2020-03-11 09:42:14 GMT [] [12598]: [4526-1] db=,user= DETAIL:  Last
> > completed transaction was at log time 2020-03-11 09:42:13.900088+00.
> > 2020-03-11 09:42:44 GMT [] [12598]: [4527-1] db=,user= LOG:
> >   restartpoint starting: time
> > 2020-03-11 09:43:53 GMT [10.150.20.22(54906)] [51199]: [1-1]
> > db=[unknown],user=replicator LOG:  terminating walsender process
> due to
> > replication timeout
> > 2020-03-11 09:47:14 GMT [] [12598]: [4528-1] db=,user= LOG:
> >   restartpoint complete: wrote 20966 buffers (0.2%); 0 WAL file(s)
> > added, 0 removed, 9 recycled; write=270.048 s, sync=0.014 s,
> > total=270.085 s; sync files=852, longest=0.001 s, average=0.000 s;
> > distance=183749 kB, estimate=507974 kB
> > 2020-03-11 09:47:14 GMT [] [12598]: [4529-1] db=,user= LOG:
>  recovery
> > restart point at 643B/12680A80
> > 2020-03-11 09:47:14 GMT [] [12598]: [4530-1] db=,user= DETAIL:  Last
> > completed transaction was at log time 2020-03-11 09:47:14.069731+00.
> > 2020-03-11 09:47:44 GMT [] [12598]: [4531-1] db=,user= LOG:
> >   restartpoint starting: time
> >
> >
> >
> > Il giorno mer 11 mar 2020 alle ore 01:53 Adrian Klaver
> > <adrian(dot)klaver(at)aklaver(dot)com <mailto:adrian(dot)klaver(at)aklaver(dot)com>
> <mailto:adrian(dot)klaver(at)aklaver(dot)com
> <mailto:adrian(dot)klaver(at)aklaver(dot)com>>> ha scritto:
> >
> >     On 3/10/20 8:17 AM, Nicola Contu wrote:
> >     Please post to list also.
> >     Ccing list.
> >
> >     What came immediately before the temporary file error?
> >
> >      >    2020-03-10 15:10:17 GMT [[local]] [28171]: [1-1]
> >      > db=postgres,user=postgres LOG:  temporary file: path
> >      > "base/pgsql_tmp/pgsql_tmp28171.0", size 382474936
> >      > 2020-03-10 15:10:17 GMT [[local]] [28171]: [4-1]
> >      > db=postgres,user=postgres LOG:  could not send data to client:
> >     Broken pipe
> >      > 2020-03-10 15:10:17 GMT [[local]] [28171]: [5-1]
> >      > db=postgres,user=postgres FATAL:  connection to client lost
> >      > 2020-03-10 15:10:26 GMT [] [12598]: [3544-1] db=,user= LOG:
> >      >   restartpoint complete: wrote 37315 buffers (0.4%); 0 WAL
> file(s)
> >      > added, 0 removed, 16 recycled; write=269.943 s, sync=0.039 s,
> >      > total=269.999 s; sync files=1010, longest=0.001 s,
> average=0.000 s;
> >      > distance=175940 kB, estimate=416149 kB
> >      > 2020-03-10 15:10:26 GMT [] [12598]: [3545-1] db=,user= LOG:
> >       recovery
> >      > restart point at 6424/1D7DEDE8
> >      >
> >      > It is a cascade replication
> >      >
> >      > Il giorno mar 10 mar 2020 alle ore 15:58 Adrian Klaver
> >      > <adrian(dot)klaver(at)aklaver(dot)com
> <mailto:adrian(dot)klaver(at)aklaver(dot)com> <mailto:adrian(dot)klaver(at)aklaver(dot)com
> <mailto:adrian(dot)klaver(at)aklaver(dot)com>>
> >     <mailto:adrian(dot)klaver(at)aklaver(dot)com
> <mailto:adrian(dot)klaver(at)aklaver(dot)com>
> >     <mailto:adrian(dot)klaver(at)aklaver(dot)com
> <mailto:adrian(dot)klaver(at)aklaver(dot)com>>>> ha scritto:
> >      >
> >      >     On 3/10/20 2:26 AM, Nicola Contu wrote:
> >      >      > Hello,
> >      >      > I have two servers connected to the same switch running
> >     postgres 11.5
> >      >      >
> >      >      > I am trying to replicate one of those servers after
> a planned
> >      >     work on
> >      >      > the master, so the replica has been lost. It has
> always worked
> >      >     but now I
> >      >      > get this :
> >      >      >
> >      >      > pg_basebackup: could not receive data from WAL
> stream: server
> >      >     closed the
> >      >      > connection unexpectedly
> >      >      >          This probably means the server terminated
> abnormally
> >      >      >          before or while processing the request.
> >      >      >
> >      >      > I don't really understand what the issue is.
> >      >
> >      >     I would start with the logs from the Postgres server
> you are
> >     taking the
> >      >     backup from.
> >      >
> >      >      > I had this issue last week as well in another DC
> and I had to
> >      >     reboot the
> >      >      > slave to make it working (not sure why it helped)
> >      >      >
> >      >      > Do you know what can cause this?
> >      >      >
> >      >      > Thank you,
> >      >      > Nicola
> >      >
> >      >
> >      >     --
> >      >     Adrian Klaver
> >      > adrian(dot)klaver(at)aklaver(dot)com
> <mailto:adrian(dot)klaver(at)aklaver(dot)com> <mailto:adrian(dot)klaver(at)aklaver(dot)com
> <mailto:adrian(dot)klaver(at)aklaver(dot)com>>
> >     <mailto:adrian(dot)klaver(at)aklaver(dot)com
> <mailto:adrian(dot)klaver(at)aklaver(dot)com> <mailto:adrian(dot)klaver(at)aklaver(dot)com
> <mailto:adrian(dot)klaver(at)aklaver(dot)com>>>
> >      >
> >
> >
> >     --
> >     Adrian Klaver
> > adrian(dot)klaver(at)aklaver(dot)com <mailto:adrian(dot)klaver(at)aklaver(dot)com>
> <mailto:adrian(dot)klaver(at)aklaver(dot)com <mailto:adrian(dot)klaver(at)aklaver(dot)com>>
> >
>
>
> --
> Adrian Klaver
> adrian(dot)klaver(at)aklaver(dot)com <mailto:adrian(dot)klaver(at)aklaver(dot)com>
>

--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com