We are currently encountering a compatibility issue between IIS and Tomcat when using the AJP protocol. Our setup works as expected with Tomcat version 9.0.89, including the successful delivery of large static .min.js files (e.g., >1.5 MB). However, after upgrading to Tomcat version 9.0.108, we are experiencing failures for the same URLs. Specifically, the browser reports a net::ERR_CONTENT_DECODING_FAILED error, and no response is received. Interestingly, static resources smaller than approximately 6 KB are served correctly in both Tomcat versions. This suggests that Tomcat 9.0.108 handles smaller responses properly but may be encountering issues with larger compressed responses. We suspect that changes in Tomcat 9.0.108 related to compression or response buffering may be contributing to this behavior. To help resolve this, we would appreciate your guidance on:
1. Any known changes in Tomcat 9.0.108 that could affect AJP response handling or compression. 2. Recommended configuration adjustments in server.xml (e.g., packetSize, compression, MIME types). 3. IIS-level settings that may need to be updated to ensure compatibility with Tomcat 9.0.108, particularly for large static resources. Please let us know if further logs or diagnostics are required. We are happy to provide additional details to assist with troubleshooting. ________________________________ From: Thomas Sörensen <thomas.soren...@excosoft.se> Sent: Thursday, September 4, 2025 4:08 PM To: users@tomcat.apache.org <users@tomcat.apache.org> Subject: Re: Tomcat Upgrade from 9.0.89 to 9.0.108 is failing Hi We had a similar issue and it was resolve by updating the isapi_redirect.dll from 1.2.48 to 1.2.50 https://dlcdn.apache.org/tomcat/tomcat-connectors/jk/binaries/windows/<https://urldefense.com/v3/__https://dlcdn.apache.org/tomcat/tomcat-connectors/jk/binaries/windows/__;!!AI5hVGByxkJIiw!gImppIR0VVKTxfTHmKQ4iv7Dm4b3SY-5k_5b-IpSES4Oa52bE0uinqTCLHQakecfy1kvL_Ls6K_1-Z_82NwRRYowQPsu-baVlYHLYg$> It's worth a shot. [1467204888818_logo-sm.png] Excosoft • Thomas Sörensen Cell +46 (0)76-199 3184 Email thomas.soren...@excosoft.se<mailto:thomas.soren...@excosoft.se> www.excosoft.se<https://urldefense.com/v3/__http://www.excosoft.se/__;!!AI5hVGByxkJIiw!gImppIR0VVKTxfTHmKQ4iv7Dm4b3SY-5k_5b-IpSES4Oa52bE0uinqTCLHQakecfy1kvL_Ls6K_1-Z_82NwRRYowQPsu-bb4XYpjUg$> ________________________________ From: Boddapu, Ramdev <ramdev.bodd...@fisglobal.com.INVALID> Sent: 03 September 2025 17:08 To: users@tomcat.apache.org <users@tomcat.apache.org> Subject: Re: Tomcat Upgrade from 9.0.89 to 9.0.108 is failing Thanks Mark for your responce , below is the required details . we havent checked all version's but when we check on 9.0.100 it failed , it worked on 9.0.89 Let me know if you have any findings , i will also try to find from which version it started failing . IIS - 10 express Windows OS version - Windows server IIS version - 10 ISAPI redirector version - 1.2.48 ISAPI redirector config? ```` extension_uri=/myproject/isapi_redirect.dll log_file=C:/iis/isapi/isapi_redirect.log log_level=info worker_file=C:/iis/isapi/workers.properties worker_mount_file=C:/iis/isapi/uriworkermap.properties ```` ```` worker.list=ag_loadbalancer,status worker.ag-host1-node1.type = ajp13 worker.ag-host1-node1.host = tomcat-host worker.ag-host1-node1.port = 8109 worker.ag-host1-node1.retries = 3 worker.ag-host1-node1.recovery_options = 16 worker.ag-host1-node1.secret=secretTest1 # Define worker list for ag load balancer worker.ag_loadbalancer.type = lb worker.ag_loadbalancer.balance_workers =ag-host1-node1 worker.ag_loadbalancer.sticky_session = false worker.ag_loadbalancer.retries = 3 # Define the status worker.status.type = status ```` AJP connector config? <Connector protocol="AJP/1.3" address="0.0.0.0" port="8109" redirectPort="8443" secretRequired="true" secret="secretTest1" allowedRequestAttributesPattern=".*" /> Thanks, Ramdev. ________________________________ From: Mark Thomas <ma...@apache.org> Sent: Wednesday, September 3, 2025 8:19 PM To: users@tomcat.apache.org <users@tomcat.apache.org> Subject: Re: Tomcat Upgrade from 9.0.89 to 9.0.108 is failing Windows OS version? IIS version? ISAPI redirector version? ISAPI redirector config? AJP connector config? Does this happen on all connections or just some connections? Which version of Tomcat does this start with? You will need to perform a (I suggest binary) search from 9.0.89 to 9.0.108 to find out the last version this worked / the first version this failed. Mark On 03/09/2025 15:44, Boddapu, Ramdev wrote: > We have setup with IIS -> tomcat(9.0.89) with AJP , this works perfectly . > But when we upgraded tomcat to 9.0.108 it is failing with below error . > 03-Sep-2025 15:03:14.392 FINE [ajp-nio-0.0.0.0-8109-exec-4] > org.apache.coyote.AbstractProcessor.setErrorState Error state > [CLOSE_CONNECTION_NOW] reported while processing request > java.io.EOFException > at > org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper.fillReadBuffer(NioEndpoint.java:1385) > at > org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper.fillReadBuffer(NioEndpoint.java:1336) > at > org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper.read(NioEndpoint.java:1243) > at org.apache.coyote.ajp.AjpProcessor.read(AjpProcessor.java:1194) > at org.apache.coyote.ajp.AjpProcessor.readMessage(AjpProcessor.java:560) > at org.apache.coyote.ajp.AjpProcessor.service(AjpProcessor.java:349) > at > org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63) > at > org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:935) > at > org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1826) > at > org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52) > at > org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1189) > at > org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:658) > at > org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:63) > at java.base/java.lang.Thread.run(Thread.java:834) > > > Thanks , any help is apricated . > > The information contained in this message is proprietary and/or confidential. > If you are not the intended recipient, please: (i) delete the message and all > copies; (ii) do not disclose, distribute or use the message in any manner; > and (iii) notify the sender immediately. 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