Re: Replication failed

Yes.

There was a crash.

Master recovered automatically .. But replication failed.

See blow log from Master.

cp: error writing '/BackupVolume/hisDbBackup/WALs/0000000200000AE6000000B9': No space left on device
2020-12-17 21:55:26 +04 [55822]: user=,db=,app=,client= LOG: archive command failed with exit code 1
2020-12-17 21:55:26 +04 [55822]: user=,db=,app=,client= DETAIL: The failed archive command was: test ! -f /BackupVolume/dbWALBack/WALs/0000000200000AE6000000B9 && cp pg_wal/0000000200000AE6000000B9 /BackupVolume/hisDbBackup/WALs/0000000200000AE6000000B9

2020-12-17 21:53:56 +04 [84225]: user=AstDBA,db=AST-PROD,app=[unknown],client=172.18.200.100 HINT: In a moment you should be able to reconnect to the database and repeat your command.
2020-12-17 21:53:56 +04 [51102]: user=AstDBA,db=AST-PROD,app=[unknown],client=172.18.200.100 WARNING: terminating connection because of crash of another server process
2020-12-17 21:53:56 +04 [51102]: user=AstDBA,db=AST-PROD,app=[unknown],client=172.18.200.100 DETAIL: The postmaster has commanded this server process to roll back the current transaction and exit, because another server process exited abnormally and possibly corrupted shared memory.


2020-12-17 21:55:20 +04 [55808]: user=replicator,db=[unknown],app=[unknown],client=172.18.200.144 FATAL: the database system is in recovery mode


2020-12-17 21:55:25 +04 [55828]: user=replicator,db=[unknown],app=walreceiver,client=172.18.200.148 ERROR: requested starting point AEA/A2000000 is ahead of the WAL flush position of this server AEA/A1FFFA50
2020-12-17 21:55:25 +04 [55827]: user=replicator,db=[unknown],app=walreceiver,client=172.18.200.147 ERROR: requested starting point AEA/A2000000 is ahead of the WAL flush position of this server AEA/A1FFFA50
2020-12-17 21:55:25 +04 [55829]: user=replicator,db=[unknown],app=walreceiver,client=172.18.200.145 ERROR: requested starting point AEA/A2000000 is ahead of the WAL flush position of this server AEA/A1FFFA50
2020-12-17 21:55:25 +04 [55830]: user=replicator,db=[unknown],app=walreceiver,client=172.18.200.146 ERROR: requested starting point AEA/A2000000 is ahead of the WAL flush position of this server AEA/A1FFFA50
2020-12-17 21:55:25 +04 [55831]: user=replicator,db=[unknown],app=walreceiver,client=172.18.200.144 ERROR: requested starting point AEA/A2000000 is ahead of the WAL flush position of this server AEA/A1FFFA50

On 18/12/20, 2:13 PM, "Laurenz Albe" <laurenz(dot)albe(at)cybertec(dot)at> wrote:

On Fri, 2020-12-18 at 00:56 +0530, Sreejith P wrote:
> We had 1 M x 4 slave server streaming replication using Postgres 10. Was working successfully for long time.
>
> Suddenly all replication servers got failed and getting following message.
>
> 2020-12-17 22:24:32 +04 [1587]: [357-1] db=,user=LOG: invalid contrecord length 2722 at AEA/A1FFF9E0.
>
> Requesting help for identifying root cause.

Looks like this problem:
https://postgr.es/m/77734732-44A4-4209-8C2F-3AF36C9D4D18%40amazon.com

Was there a crash on the primary sever?

There is a patch under development at this thread:
https://postgr.es/m/CBDDFA01-6E40-46BB-9F98-9340F4379505%40amazon.com

Yours,
Laurenz Albe

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