Javamail send error "could not convert socket to TLS"

Hi

We have a small java module that generates a report from some data and then e-mails it to the User.

We have just recently started getting the following error from our e-mail log.  It appears to have started from a specific date, and it does not happen all the time.

It looks to me as if an expert might well be able to tell us the problem almost immediately??

I am including a sample of a good e-mail log and a bad e-mail log (the bad one is always the same)

Good e-mail log;

Jan 4, 2011 6:04:24 PM iopener.poller.DirectoryPolling run
INFO: Processing file :0241p75kke7a.csv
Jan 4, 2011 6:04:25 PM iopener.GenerateReportCLI readInputFile
INFO: 1 lines are read from the file /home/ippq360/public_html/ippq/ProjectGenerator/ReportGenerator/../ReportCSV/0241p75kke7a.csv
Jan 4, 2011 6:04:25 PM iopener.GenerateReportCLI processFile
INFO: Full version of personal report is generated for USER1
Jan 4, 2011 6:04:26 PM iopener.GenerateReportCLI sendMail
INFO: Emails are sent to recepient(s) : USER1@qwe.com , MANAGER@you.co.uk

Example of error e-mail log;

Jan 5, 2011 4:38:31 PM iopener.poller.DirectoryPolling run
INFO: Processing file :Free0269.csv
Jan 5, 2011 4:38:31 PM iopener.GenerateReportCLI readInputFile
INFO: 1 lines are read from the file /home/ippq360/public_html/ippq/ProjectGenerator/ReportGenerator/../ReportCSV/Free0269.csv
Jan 5, 2011 4:38:32 PM iopener.GenerateReportCLI processFile
INFO: Full version of personal report is generated for USER2
Jan 5, 2011 4:38:32 PM iopener.GenerateReportCLI sendMail
SEVERE: Error : Problem in sending email.
Could not convert socket to TLS
Jan 5, 2011 4:38:32 PM iopener.GenerateReportCLI processFile
SEVERE: Error in sending mailjavax.mail.MessagingException: Could not convert socket to TLS;
nested exception is:
      javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

Chris_RyanAsked:
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objectsCommented:
sounds like an ssl certificate has expired
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objectsCommented:
strange its not happening all the time though

check the full stack trace to see where its occurring
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Chris_RyanAuthor Commented:
Thanks so much for the very quick response.

It is weird about the inconsistency.   The SSL certificate should be fine, but I think you are pointing us in the right direction.  We think it might be something to do with some internal Javamail certificates that need setting up or rather re-setting.

I'll let you know the final result as soon as we have sorted it.

Once again, many thanks
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