Error catching question:

ruby-talk
1

I have some code that checks a pop3 email box for me. It is wrapped in a
begin/rescue clause. However, somehow it seems to have escaped the rescue
clause:

/usr/lib/ruby/1.8/net/protocol.rb:197:in rbuf_fill': socket read timeout (60 sec) (Timeout::Error) from /usr/lib/ruby/1.8/net/protocol.rb:160:inreaduntil’
from /usr/lib/ruby/1.8/net/protocol.rb:178:in each_message_chunk' from /usr/lib/ruby/1.8/net/pop.rb:791:inretr’
from /usr/lib/ruby/1.8/net/pop.rb:789:in critical' from /usr/lib/ruby/1.8/net/pop.rb:792:inretr’
from /usr/lib/ruby/1.8/net/pop.rb:648:in pop' from fido.rb:33:incheckNewRequests’
from fido.rb:31:in each' from /usr/lib/ruby/1.8/net/pop.rb:517:ineach’
from fido.rb:31:in checkNewRequests' from fido.rb:30:instart’
from /usr/lib/ruby/1.8/net/pop.rb:323:in start' from fido.rb:30:incheckNewRequests’
from fido.rb:20:in `start’
from fido.rb:161

Here’s the code:

def checkNewRequests()
begin
Net::POP3.start(“mta.algx.net”, 110, “blah”, “passblah”) { |pop|
pop.each { |msg|
puts “Checking msg #{msg.id}” if DEBUG
if msg.pop =~ /Subject: [fF]ido/
if msg.pop =~ /–reload–/
printInfo(“Agent reload requested”)
loadAgents()
msg.delete
else # process request
mailMsg = MailMsg.new(msg)
request = Request.new(mailMsg.agentList)
success = request.doAgents
printInfo(“Success = #{success}”)
if success
printInfo(“Sending response to
#{mailMsg.from}”)
sendEmail(mailMsg.from, request.getResponse)
msg.delete
end
end
end
}
}
rescue
printInfo(“Problem checking email…retrying in 30 seconds”)
sleep 30
end
end

Any ideas why the begin/rescue didn’t catch it?

Thanks,.
Greg B.

2

I have some code that checks a pop3 email box for me. It is wrapped in a
begin/rescue clause. However, somehow it seems to have escaped the rescue
clause:

[snip]

Any ideas why the begin/rescue didn’t catch it?

Thanks,.
Greg B.

rescue by itself only catches StandardError and derivatives I think…

try

begin
#your code
rescue Exception => e
#your code
end

···

On Monday 12 Apr 2004 4:24 pm, Greg Brondo wrote:

–
Martin Hart
Arnclan Limited
Union Street, Dunstable, LU6 1EX

3

I have some code that checks a pop3 email box for me. It is wrapped
in a begin/rescue clause. However, somehow it seems to have escaped
the rescue clause:

    rescue
        printInfo("Problem checking email...retrying in 30
        seconds") sleep 30
    end
end

Any ideas why the begin/rescue didn’t catch it?

Thanks,.
Greg B.

I believe if you write a rescue clause with no Exception listed, the
it defaults to StandardError, so if the Exception was not a
StandardError you wouldn’t catch it.

Walt

···

Walter Szewelanczyk
IS Director
M.W. Sewall & CO. email : walter@mwsewall.com
259 Front St. Phone : (207) 442-7994 x 128
Bath, ME 04530 Fax : (207) 443-6284

4

Martin Hart wrote:

···

On Monday 12 Apr 2004 4:24 pm, Greg Brondo wrote:

I have some code that checks a pop3 email box for me. It is wrapped in a
begin/rescue clause. However, somehow it seems to have escaped the rescue
clause:

[snip]

Any ideas why the begin/rescue didn’t catch it?

Thanks,.
Greg B.

rescue by itself only catches StandardError and derivatives I think…

try

begin
#your code
rescue Exception => e
#your code
end

Thanks!

Greg B.