Re: No such file or directory in pg_replslot

On December 8, 2018 9:08:09 AM PST, Jeremy Finzel <finzelj@gmail.com> wrote:
>I don't know if this applies only to pglogical or logical decoding in
>general.  This is on a 9.6.10 provider running pglogical 2.2.0.
>Subscriber
>has same versions.  We had a replication delay situation this morning,
>which I think may have been due to a really long transaction but I've
>yet
>to verify that.
>
>I disabled and re-enabled replication and at one point, this created an
>error on start_replication_slot that the pid was already active.
>
>Somehow replication got wedged and now even though replication appears
>to
>be working, strace shows these kinds of errors continually:
>open("pg_replslot/pgl_foo_providerb97b25d_foo336ddc1/xid-1248981532-lsn-C940-F4000000.snap",
>O_RDONLY) = -1 ENOENT (No such file or directory)
>open("pg_replslot/pgl_foo_providerb97b25d_foo336ddc1/xid-1248981532-lsn-C940-F5000000.snap",
>O_RDONLY) = -1 ENOENT (No such file or directory)
>open("pg_replslot/pgl_foo_providerb97b25d_foo336ddc1/xid-1248981532-lsn-C940-F6000000.snap",
>O_RDONLY) = -1 ENOENT (No such file or directory)
>open("pg_replslot/pgl_foo_providerb97b25d_foo336ddc1/xid-1248981532-lsn-C940-F7000000.snap",
>O_RDONLY) = -1 ENOENT (No such file or directory)
>open("pg_replslot/pgl_foo_providerb97b25d_foo336ddc1/xid-1248981532-lsn-C940-F8000000.snap",
>O_RDONLY) = -1 ENOENT (No such file or directory)
>open("pg_replslot/pgl_foo_providerb97b25d_foo336ddc1/xid-1248981532-lsn-C940-F9000000.snap",
>O_RDONLY) = -1 ENOENT (No such file or directory)
>open("pg_replslot/pgl_foo_providerb97b25d_foo336ddc1/xid-1248981532-lsn-C940-FA000000.snap",
>O_RDONLY) = -1 ENOENT (No such file or directory)
>open("pg_replslot/pgl_foo_providerb97b25d_foo336ddc1/xid-1248981532-lsn-C940-FB000000.snap",
>O_RDONLY) = -1 ENOENT (No such file or directory)
>open("pg_replslot/pgl_foo_providerb97b25d_foo336ddc1/xid-1248981532-lsn-C940-FC000000.snap",
>O_RDONLY) = -1 ENOENT (No such file or directory)
>open("pg_replslot/pgl_foo_providerb97b25d_foo336ddc1/xid-1248981532-lsn-C940-FD000000.snap",
>O_RDONLY) = -1 ENOENT (No such file or directory)
>open("pg_replslot/pgl_foo_providerb97b25d_foo336ddc1/xid-1248981532-lsn-C940-FE000000.snap",
>O_RDONLY) = -1 ENOENT (No such file or directory)
>
>Any suggestions?  This is a showstopper for us.

That doesn't indicate an error.  You need to provide more details what made you consider things wedged...

Andres
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