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[LDM #QEQ-844250]: LDM pq_sequence failed: Input/output error (errno = 5)

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  • Subject: [LDM #QEQ-844250]: LDM pq_sequence failed: Input/output error (errno = 5)
  • Date: Thu, 11 Aug 2011 11:21:58 -0600
Andrew,

> Attached is my ldmd.log
> 
> I have LDM6.9.7 installed on a Centos 5 x86_64 server.
> 
> It keeps splitting out messages about pq_sequence failed: Input/output
> error (errno = 5)
> 
> Jul 30 14:38:29 hcpldml02 10.144.16.207(feed)[6523] ERROR:
> forn5_svc.c:130: blkdata5(0): RPC: Unable to receive
> 
> Jul 30 14:38:29 hcpldml02 10.144.16.207(feed)[6523] ERROR: pq_sequence
> failed: Input/output error (errno = 5)
> 
> I read in the LDM support archives about this issue, but wasn't able to
> find a clear answer and or fix for it.
> 
> I have stopped, deleted the queue, remade the queue, then restarted, but
> this did not fix the issue.
> 
> Any help would great.

The error messages mean that the upstream LDM process on host "hcpldml02" was 
unable to communicate with its corresponding downstream LDM process on host 
"10.144.16.207".

The following message occurs a few seconds after the error messages:

Jul 30 00:38:09 hcpldml02 10.144.16.207(feed)[858] NOTE: Starting Up(6.9.7/5): 
20110730003809.174 TS_ENDT {{ANY,  ".*"}} 

Note that the downstream host is the same. I suspect that the downstream LDM 
process on that host decided to switch the data transmission mode from 
ALTERNATE to PRIMARY, which necessitated breaking the connection and then 
remaking it. Consequently, the error messages may be safely ignored.

> Thanks.
> 
> Andrew Little
> Weather Systems Analyst
> Universal Weather & Aviation
> 8787 Tallyho Road
> Houston, Texas 77061
> (713) 947-5633
> (713) 504-2719
> 
> address@hidden <mailto:address@hidden>
> 
> Success from the word GO.

Regards,
Steve Emmerson

Ticket Details
===================
Ticket ID: QEQ-844250
Department: Support LDM
Priority: Urgent
Status: Closed