I set up a simple test to send 50 emails through google app's SMTP server
with a short delay between them (just testing to see what I'm allowed to
do).
I set this up by opening 50 threads and pausing at different intervals for
each thread.
I notice that I sometimes end up with a thread that hangs indefinitely on a
connection that seems to be hung, but never times out (see the thread dump
below for one such case, it's been left hung for > 10 min now):
Any thoughts on this? Kind of scares me to think what might happen to a
server posting emails in the background. I would expect network timeouts to
all be handled at least with a default value by a simplifying wrapper class
such as this is. Or am I missing some logic here maybe?
Thanks,
David
Thread [Thread-23] (Suspended)
SocketInputStream.socketRead0(FileDescriptor, byte[], int, int, int)
line: not available [native method]
SocketInputStream.read(byte[], int, int) line: not available
InputRecord.readFully(InputStream, byte[], int, int) line: not
available
InputRecord.read(InputStream, OutputStream) line: not available
SSLSocketImpl.readRecord(InputRecord, boolean) line: not available
SSLSocketImpl.readDataRecord(InputRecord) line: not available
AppInputStream.read(byte[], int, int) line: not available
TraceInputStream.read(byte[], int, int) line: 106
BufferedInputStream.fill() line: not available
BufferedInputStream.read() line: not available
LineInputStream.readLine() line: 84
SMTPTransport.readServerResponse() line: 1903
SMTPTransport.issueSendCommand(String, int) line: 1808
SMTPTransport.finishData() line: 1634
SMTPTransport.sendMessage(Message, Address[]) line: 889
Transport.send0(Message, Address[]) line: 191
Transport.send(Message) line: 120
HtmlEmail(Email).sendMimeMessage() line: 1232
HtmlEmail(Email).send() line: 1267
GoogleAppsEmailTest.sendEmail(int) line: 51
GoogleAppsEmailTest$1.run() line: 17
Thread.run() line: not available
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