Comment 29 for bug 1765616

Issue seems to be back with 8.5.30-1ubuntu1.4

It doesn't seem to affect startup, but happens in some situations, e.g.: direct output of files through response stream.
Issue is in file tomcat-coyote.jar, as replacing Ubuntu's file with upstream's tomcat-coyote.jar makes the issue disappear.

Upstream's and Ubuntu's files have indeed different md5sums.

gem-lx1-sv@gem-lx1-sv:/usr/share/java$ md5sum tomcat8-coyote-8.5.30-apache.jar tomcat8-coyote-8.5.30.jar
993e7d3920e00f39b7287fa5f5177a33 tomcat8-coyote-8.5.30-apache.jar
91de49bd30f68be4cbf64e217e98fbc8 tomcat8-coyote-8.5.30.jar

gem-lx1-sv@gem-lx1-sv:/usr/share/java$ ls -lha tomcat8-coyote*
-rw-r--r-- 1 root root 782K Nov 8 15:46 tomcat8-coyote-8.5.30-apache.jar
-rw-r--r-- 1 root root 782K Aug 13 22:23 tomcat8-coyote-8.5.30.jar
lrwxrwxrwx 1 root root 25 Aug 13 22:23 tomcat8-coyote.jar -> tomcat8-coyote-8.5.30-apache.jar

Stack trace for the bug:
[08-Nov-2018 13:25:26.651 SEVERE [http-nio-8080-exec-1] org.apache.coyote.http11.Http11Processor.service Error processing request
 java.lang.NoSuchMethodError: java.nio.ByteBuffer.limit(I)Ljava/nio/ByteBuffer;
        at org.apache.coyote.http11.filters.IdentityOutputFilter.doWrite(IdentityOutputFilter.java:111)
        at org.apache.coyote.http11.Http11OutputBuffer.doWrite(Http11OutputBuffer.java:226)
        at org.apache.coyote.Response.doWrite(Response.java:541)
        at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:351)
        at org.apache.catalina.connector.OutputBuffer.flushByteBuffer(OutputBuffer.java:815)
        at org.apache.catalina.connector.OutputBuffer.doFlush(OutputBuffer.java:310)
        at org.apache.catalina.connector.OutputBuffer.close(OutputBuffer.java:263)
        at org.apache.catalina.connector.Response.finishResponse(Response.java:484)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:373)
        at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803)
        at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
        at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:800)
        at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1463)
        at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
        at java.lang.Thread.run(Thread.java:748)

I kindly request to either not recompile upstream's binary jars, or set a java8 JDK as default compiler for 18.04 or until java11 is stable on Ubuntu.