On 09/03/2021 20:57, DevNull wrote:
Apache Tomcat Version 9.0.43
Hello
In an application showing hundreds of thumbnail images at the same time,
about a hundred thumbnails are loaded but the rest are not. Some posts
claim it may be due to the http2 connection closing due to too much
overhead.
I've tried to set overheadDataThreshold="0" in server.xml but I see no
change in number of loaded images.
Is there any other configuration I should try?
Worth setting the other overhead* attributes listed at
http://tomcat.apache.org/tomcat-9.0-doc/config/http2.html to zero as well.
Un-commenting the HTTP/2 debug logging in
CATALINA_BASE/conf/logging.properties and re-testing might provide some
additional information.
Mark
I've tried running the same code in Jetty 10.0.1 and got it working by
increasing the http2 rate control limit.
Please see stacktrace and server.xml below.
Server side, I get exceptions for each thumbnail that is not loaded.
From catalina.log:
09-Mar-2021 05:51:32.635 FINE [https-jsse-nio-443-exec-28]
org.apache.coyote.AbstractProcessor.setErrorState Error state
[CLOSE_NOW] reported while processing request
org.apache.coyote.CloseNowException:
org.apache.coyote.http2.StreamException: Connection [{0}], Stream [{1}],
This stream is not writable
at
org.apache.coyote.http2.Stream$StreamOutputBuffer.end(Stream.java:941)
at
org.apache.coyote.http2.Http2OutputBuffer.end(Http2OutputBuffer.java:71)
at
org.apache.coyote.http2.StreamProcessor.finishResponse(StreamProcessor.java:209)
at
org.apache.coyote.AbstractProcessor.action(AbstractProcessor.java:389)
at
org.apache.coyote.http2.StreamProcessor.service(StreamProcessor.java:429)
at
org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
at
org.apache.coyote.http2.StreamProcessor.process(StreamProcessor.java:74)
at
org.apache.coyote.http2.StreamRunnable.run(StreamRunnable.java:35)
at
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.base/java.lang.Thread.run(Thread.java:835)
Caused by: org.apache.coyote.http2.StreamException: Connection
[{0}], Stream [{1}], This stream is not writable
at
org.apache.coyote.http2.Stream.doStreamCancel(Stream.java:247)
at
org.apache.coyote.http2.Http2UpgradeHandler.reserveWindowSize(Http2UpgradeHandler.java:856)
at
org.apache.coyote.http2.Stream$StreamOutputBuffer.flush(Stream.java:900)
at
org.apache.coyote.http2.Stream$StreamOutputBuffer.doWrite(Stream.java:819)
at
org.apache.coyote.http2.Http2OutputBuffer.doWrite(Http2OutputBuffer.java:59)
at org.apache.coyote.Response.doWrite(Response.java:601)
at
org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:339)
at
org.apache.catalina.connector.OutputBuffer.appendByteArray(OutputBuffer.java:746)
at
org.apache.catalina.connector.OutputBuffer.append(OutputBuffer.java:675)
at
org.apache.catalina.connector.OutputBuffer.writeBytes(OutputBuffer.java:386)
at
org.apache.catalina.connector.OutputBuffer.write(OutputBuffer.java:364)
at
org.apache.catalina.connector.CoyoteOutputStream.write(CoyoteOutputStream.java:96)
at
java.base/java.io.BufferedOutputStream.write(BufferedOutputStream.java:123)
at
skintaby.imgar.server.web.ImageArchiveServlet.getBinary(ImageArchiveServlet.java:460)
at
skintaby.imgar.server.web.ImageArchiveServlet.doGet(ImageArchiveServlet.java:127)
at
javax.servlet.http.HttpServlet.service(HttpServlet.java:626)
at
javax.servlet.http.HttpServlet.service(HttpServlet.java:733)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at
org.apache.logging.log4j.web.Log4jServletFilter.doFilter(Log4jServletFilter.java:71)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)
at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
at
org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:687)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:346)
at
org.apache.coyote.http2.StreamProcessor.service(StreamProcessor.java:404)
... 7 more
server.xml:
<?xml version="1.0" encoding="UTF-8"?>
<Server port="8005" shutdown="SHUTDOWN">
<Listener
className="org.apache.catalina.startup.VersionLoggerListener" />
<Listener className="org.apache.catalina.core.AprLifecycleListener"
SSLEngine="on" />
<Listener
className="org.apache.catalina.core.JreMemoryLeakPreventionListener" />
<Listener
className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" />
<Listener
className="org.apache.catalina.core.ThreadLocalLeakPreventionListener" />
<Service name="Catalina">
<Connector port="443"
protocol="org.apache.coyote.http11.Http11NioProtocol"
sslImplementationName="org.apache.tomcat.util.net.jsse.JSSEImplementation"
maxThreads="150"
SSLEnabled="true" >
<UpgradeProtocol className="org.apache.coyote.http2.Http2Protocol"
overheadDataThreshold="0" />
<SSLHostConfig honorCipherOrder="false">
<Certificate certificateKeystoreFile ="keystore"
certificateKeystorePassword ="qwerty"/>
</SSLHostConfig>
</Connector>
<Engine name="Catalina" defaultHost="localhost">
<Host name="localhost" appBase="webapps"
unpackWARs="true" autoDeploy="true">
<Valve className="org.apache.catalina.valves.AccessLogValve"
directory="log"
prefix="localhost_access_log"
suffix=".txt"
pattern="%h %l %u %t "%r" %s %b" />
</Host>
</Engine>
</Service>
</Server>
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