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https://issues.apache.org/jira/browse/JAMES-4045?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17855499#comment-17855499
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Benoit Tellier commented on JAMES-4045:
---------------------------------------
Hello,
Is it possible to get the server logs? DEBUG logs might be needed to fully
diagnose this.
This reminds me of https://issues.apache.org/jira/browse/JAMES-3741 that I
solved a couple of years ago...
> Executing TLS a lot of times and will sometimes result in an exception
> ----------------------------------------------------------------------
>
> Key: JAMES-4045
> URL: https://issues.apache.org/jira/browse/JAMES-4045
> Project: James Server
> Issue Type: Bug
> Components: SMTPServer
> Affects Versions: 3.9.0
> Reporter: Romain Moreau
> Priority: Major
>
> With a {{{}SMTPSClient{}}}, if you try many times to {{{}connect{}}},
> {{EHLO}} then {{{}execTLS{}}}, {{execTLS}} will sometimes throw an exception.
> This can be reproduced by simply adding a loop to this existing test:
> {code:java}
> @Test
> void startTlsShouldReturnTrueWhenServerSupportsIt() throws Exception {
> server = createServer(createProtocol(Optional.empty()),
> Encryption.createStartTls(BogusSslContextFactory.getServerContext()));
> smtpsClient = createClient();
> server.bind();
> for (var i = 0; i < 5_000; i++) {
> InetSocketAddress bindedAddress = new
> ProtocolServerUtils(server).retrieveBindedAddress();
> smtpsClient.connect(bindedAddress.getAddress().getHostAddress(),
> bindedAddress.getPort());
> smtpsClient.sendCommand("EHLO localhost");
> boolean execTLS = smtpsClient.execTLS();
> assertThat(execTLS).isTrue();
> }
> }
> {code}
> When the issue happens, the SMTP server seems to close the connection
> unexpectedly and {{execTLS}} will fail with the following exception:
> {noformat}
> javax.net.ssl.SSLHandshakeException: Remote host terminated the handshake
> at
> java.base/sun.security.ssl.SSLSocketImpl.handleEOF(SSLSocketImpl.java:1715)
> at java.base/sun.security.ssl.SSLSocketImpl.decode(SSLSocketImpl.java:1515)
> at
> java.base/sun.security.ssl.SSLSocketImpl.readHandshakeRecord(SSLSocketImpl.java:1422)
> at
> java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:455)
> at
> java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:426)
> at
> org.apache.commons.net.smtp.SMTPSClient.performSSLNegotiation(SMTPSClient.java:300)
> at org.apache.commons.net.smtp.SMTPSClient.execTLS(SMTPSClient.java:197)
> at
> org.apache.james.protocols.smtp.netty.NettyStartTlsSMTPServerTest.startTlsShouldReturnTrueWhenServerSupportsIt(NettyStartTlsSMTPServerTest.java:169)
> at java.base/java.util.ArrayList.forEach(ArrayList.java:1597)
> at java.base/java.util.ArrayList.forEach(ArrayList.java:1597)
> Caused by: java.io.EOFException: SSL peer shut down incorrectly
> at
> java.base/sun.security.ssl.SSLSocketInputRecord.read(SSLSocketInputRecord.java:494)
> at
> java.base/sun.security.ssl.SSLSocketInputRecord.readHeader(SSLSocketInputRecord.java:483)
> at
> java.base/sun.security.ssl.SSLSocketInputRecord.decode(SSLSocketInputRecord.java:160)
> at java.base/sun.security.ssl.SSLTransport.decode(SSLTransport.java:111)
> at java.base/sun.security.ssl.SSLSocketImpl.decode(SSLSocketImpl.java:1507)
> ... 74 more
> {noformat}
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