在Tomcat 9中配置SSL连接器引发NullPointerException
虽然我可以在localhost:8080上看到Tomcat的splash页面，但我在获得JSSE连接器工作时遇到了问题。我在Ubuntu16.04的JDK 9.0.1上使用Tomcat 9.0.2。
我的连接器是：
<Connector port="8443"
protocol="org.apache.coyote.http11.Http11NioProtocol"
sslImplementationName="org.apache.tomcat.util.net.jsse.JSSEImplementation"
maxThreads="150"
SSLEnabled="true"
scheme="https"
secure="true" >
<SSLHostConfig>
<Certificate certificateKeystoreFile="../.keystore"
certificateKeystorePassword="changeit"
certificateKeyAlias="tomcat"
type="RSA" />
</SSLHostConfig>
</Connector>但是，当我在浏览器上转到localhost:8443时，我会看到以下内容：
在Firefox上：“连接被重置。到服务器的连接在页面加载时被重置。”
在铬上：“这个页面不工作。本地主机没有发送任何数据。ERR_EMPTY_RESPONSE。”
我看到keystore文件被正确读取了。当我这么做时：
openssl s_client -debug -connect localhost:8443输出如下：
CONNECTED(00000003)
write to 0xb9f0b0 [0xb9fdb0] (305 bytes => 305 (0x131))
...
depth=0 C = EC, ST = mystate, L = mycity, O = myorg, OU = myou, CN = my name
verify error:num=18:self signed certificate
verify return:1
depth=0 C = EC, ST = mystate, L = mycity, O = myorg, OU = myou, CN = my name
verify return:1
...
Certificate chain
0 s:/C=EC/ST=mystate/L=mycity/O=myorg/OU=myou/CN=my name
i:/C=EC/ST=mystate/L=mycity/O=myorg/OU=myou/CN=my name
---
Server certificate
-----BEGIN CERTIFICATE-----
...
-----END CERTIFICATE-----
subject=/C=EC/ST=mystate/L=mycity/O=myorg/OU=myou/CN=my name
issuer=/C=EC/ST=mystate/L=mycity/O=myorg/OU=myou/CN=my name
---
No client certificate CA names sent
Peer signing digest: SHA512
Server Temp Key: ECDH, P-256, 256 bits
---
SSL handshake has read 1353 bytes and written 431 bytes
---
New, TLSv1/SSLv3, Cipher is ECDHE-RSA-AES256-GCM-SHA384
Server public key is 2048 bit
Secure Renegotiation IS supported
Compression: NONE
Expansion: NONE
No ALPN negotiated
SSL-Session:
Protocol : TLSv1.2
Cipher : ECDHE-RSA-AES256-GCM-SHA384
Session-ID: 65D77EF99F8E4E7D145ABC005CCBFAA283533280995D7203A0220A6C1D11B9D4
Session-ID-ctx:
Master-Key: 5B2734E8A9EC21DE0090F2AC288A3D6E872FB292455B6F9FF84963D77F745D2E2E627D2A4358AE4A65F89B8EA123571A
Key-Arg : None
PSK identity: None
PSK identity hint: None
SRP username: None
Start Time: 1515167322
Timeout : 300 (sec)
Verify return code: 18 (self signed certificate)在catalina.out日志文件中，我发现每当我试图通过浏览器本地主机:8443访问时，就会发生NPE：
05-Jan-2018 08:48:06.848 SEVERE [https-jsse-nio-8443-exec-1] org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun
java.lang.NullPointerException
at org.apache.tomcat.util.net.AbstractJsseEndpoint.createSSLEngine(AbstractJsseEndpoint.java:180)
at org.apache.tomcat.util.net.SecureNioChannel.processSNI(SecureNioChannel.java:325)
at org.apache.tomcat.util.net.SecureNioChannel.handshake(SecureNioChannel.java:175)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1353)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.base/java.lang.Thread.run(Thread.java:844)此异常重复10次，其中唯一不同的重复重复是第一行中的子字符串"exec-“，其中的数字从1到10 (在上面的示例中是1)。
为什么doRun方法抛出NPE对我来说是个谜。我尝试过许多配置组合，但都没有效果。怎么了？
Stack Overflow用户
发布于 2018-01-05 20:51:22
这个问题已由bug.cgi?id=61914解决，并将在Tomcat 9.0.3+中解决。
在o.a.t.util.net.AbstractJsseEndpoint.createSSLEngine()第180行中添加了一个空检查，以便在使用Java9时纠正潜在的NPE。
https://stackoverflow.com/questions/48118559
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