Sync_client fails after upgrade 2.3.16 to 2.4.4

[Bron Gondwana]

On Mon, Nov 29, 2010 at 10:25:46AM +1030, Stephen Carr wrote:
> Nov 27 14:40:03 brooks reconstruct[9639]: user.USER1.Conny.EHPS.EHPS Council: updating sync_crc 00000000 => 585A4403
> Nov 27 14:40:09 brooks sync_client[9652]: MAILBOX received NO response: IMAP_MAILBOX_CRC Checksum Failure
> Nov 27 14:40:09 brooks sync_client[9652]: CRC failure on sync for user.USER1.Conny.EHPS.Finance Committee, trying full update
> Nov 27 14:40:09 brooks sync_client[9652]: MAILBOX received NO response: IMAP_MAILBOX_CRC Checksum Failure
> Nov 27 14:40:09 brooks sync_client[9652]: do_folders(): update failed: user.USER1.Conny.EHPS.Finance Committee 'Mailbox format corruption detected'
> Nov 27 14:40:09 brooks sync_client[9652]: MAILBOX received NO response: IMAP_MAILBOX_CRC Checksum Failure
> Nov 27 14:40:09 brooks sync_client[9652]: CRC failure on sync for user.USER1.Conny.EHPS.Finance Committee, trying full update
> Nov 27 14:40:09 brooks sync_client[9652]: MAILBOX received NO response: IMAP_MAILBOX_CRC Checksum Failure
> Nov 27 14:40:09 brooks sync_client[9652]: CRC failure on sync for user.USER1.Conny.EHPS.Strawberry Fair, trying full update
> Nov 27 14:40:10 brooks sync_client[9652]: MAILBOX received NO response: IMAP_MAILBOX_CRC Checksum Failure
> Nov 27 14:40:10 brooks sync_client[9652]: do_folders(): update failed: user.USER1.Conny.EHPS.Strawberry Fair 'Mailbox format corruption detected'
> Nov 27 14:40:10 brooks sync_client[9652]: IOERROR: Mailbox format corruption detected
> Nov 27 14:40:10 brooks sync_client[9652]: Error in do_sync(): bailing out! Mailbox format corruption detected
> Nov 27 14:40:10 brooks sync_client[9652]: Processing sync log file /common/imap/sync/log-9651 failed: Mailbox format corruption detected
> Nov 27 14:40:10 brooks sync_client[9651]: process 9652 exited, status 1 

Can you tell me what the replica was saying in its syslog?

It's probably too late to ask you to enable telemetry logging
for the replication user so we can see what's going across
the wire!

Bron.