Proxy server returns "error reading from remote server" when searching on widely used term "California"

[GoogleCodeExporter]

A possible intermittent performance issue:

• What steps will reproduce the problem?
1. Visit the PAHMA Delphi home page at http://pahma.berkeley.edu/delphi
2. Enter "California" into the "Search" field.
3. Click the "Search" button

• What is the expected output?
The results of that search.

• What do you see instead?
EITHER:
If no error occurs, the results of the search are displayed, showing
thumbnails and links to the first 36 records of over >12,000 records
matching the search.
OR:
An error from an HTTP proxy server associated with the IST Unix Webfarm,
similar to the following:

The proxy server received an invalid response from an upstream server.
The proxy server could not handle the request
<http://pahma.berkeley.edu/delphi/results/>GET /delphi/results/.
Reason: Error reading from remote server

Error 502

<http://pahma.berkeley.edu/delphi/results/>http://pahma.berkeley.edu/delphi/resu
lts/
webfarm-prod-03
136.152.140.231
Thu Jan 14 09:51:51 2010

Natasha Johnson reported having encountered this error in an email sent to
Patrick Schmitz and Michael Black on Thursday, January 14, 2010 9:55 AM.

Patrick's initial thoughts: "It may be that our app timed out on an
expensive query or on too much work in the PHP. Searching on 'California'
is slow, because it has to churn through tons of results."

Original issue reported on code.google.com by aronrobe...@gmail.com on 14 Jan 2010 at 9:02

[GoogleCodeExporter]

Sent a query to the IST Unix Webfarm administrators on 2010-01-14, asking for
assistance in interpreting the error message.

This query was assigned ticket number 7145:
https://footprints.berkeley.edu/MRcgi/MRlogin.plex?DL=7145DA58
(requires login with CalNet ID)

Original comment by aronrobe...@gmail.com on 14 Jan 2010 at 9:04

[GoogleCodeExporter]

Changed owner to aronroberts.

Original comment by aronrobe...@gmail.com on 14 Jan 2010 at 9:56

[GoogleCodeExporter]

This issue was subsequently entered into the local PAHMA JIRA issue tracker - 
the
appropriate place to enter deployment-specific issues - and is being closed as a
"duplicate" here in Google Code.

Original comment by aronrobe...@gmail.com on 14 Jan 2010 at 9:58

• Changed state: Duplicate
• Added labels: DupeOfDPD-1