Good afternoon, I'm having issues with on a production API which has started to receive high volumes of traffic. At peak volume times I see many exceptions being thrown in the logs. The stack is indicating that an error occurred in the policy chain, but when it tries to write the error to the response the connection has been closed. There seems to be a couple of flavors of IOException (broken pipe or stream closed from undertow). My plugin is calling chain.doApply(request) when it succeeds but the stack trace is indicating there is then an exception being caught in doApply(Chain.java:153). I am on version 1.2.2-Final. 2017-01-05 18:28:49,095 ERROR [stderr] (default task-17) java.io.IOException: UT010029: Stream is closed 2017-01-05 18:28:49,095 ERROR [stderr] (default task-17) at io.undertow.servlet.spec.ServletOutputStreamImpl.write(ServletOutputStreamImpl.java:136) 2017-01-05 18:28:49,095 ERROR [stderr] (default task-17) at io.undertow.servlet.spec.ServletOutputStreamImpl.write(ServletOutputStreamImpl.java:128) 2017-01-05 18:28:49,095 ERROR [stderr] (default task-17) at io.apiman.gateway.platforms.servlet.GatewayServlet$4.write(GatewayServlet.java:406) 2017-01-05 18:28:49,095 ERROR [stderr] (default task-17) at io.apiman.gateway.platforms.servlet.GatewayServlet$4.write(GatewayServlet.java:395) 2017-01-05 18:28:49,095 ERROR [stderr] (default task-17) at io.apiman.gateway.engine.impl.DefaultPolicyErrorWriter.write(DefaultPolicyErrorWriter.java:87) 2017-01-05 18:28:49,095 ERROR [stderr] (default task-17) at io.apiman.gateway.platforms.servlet.GatewayServlet.writeError(GatewayServlet.java:392) 2017-01-05 18:28:49,095 ERROR [stderr] (default task-17) at io.apiman.gateway.platforms.servlet.GatewayServlet$1.handle(GatewayServlet.java:210) 2017-01-05 18:28:49,095 ERROR [stderr] (default task-17) at io.apiman.gateway.platforms.servlet.GatewayServlet$1.handle(GatewayServlet.java:157) 2017-01-05 18:28:49,095 ERROR [stderr] (default task-17) at io.apiman.gateway.engine.impl.ApiRequestExecutorImpl.lambda$wrapResultHandler$0(ApiRequestExecutorImpl.java:159) 2017-01-05 18:28:49,095 ERROR [stderr] (default task-17) at io.apiman.gateway.engine.impl.ApiRequestExecutorImpl.lambda$createPolicyErrorHandler$17(ApiRequestExecutorImpl.java:614) 2017-01-05 18:28:49,095 ERROR [stderr] (default task-17) at io.apiman.gateway.engine.policy.Chain.throwError(Chain.java:249) 2017-01-05 18:28:49,095 ERROR [stderr] (default task-17) at io.apiman.gateway.engine.policy.Chain.doApply(Chain.java:153) 2017-01-05 18:28:49,096 ERROR [stderr] (default task-17) at com.markit.ondemand.auth.apiman.plugins.pingfed_oauth_policy.PingFedOauthPolicy.doSuccess(PingFedOauthPolicy.java:114) 2017-01-05 18:28:49,096 ERROR [stderr] (default task-17) at com.markit.ondemand.auth.apiman.plugins.pingfed_oauth_policy.PingFedOauthPolicy.access$100(PingFedOauthPolicy.java:38) 2017-01-05 18:28:49,096 ERROR [stderr] (default task-17) at com.markit.ondemand.auth.apiman.plugins.pingfed_oauth_policy.PingFedOauthPolicy$2.handle(PingFedOauthPolicy.java:193) 2017-01-05 18:28:49,096 ERROR [stderr] (default task-17) at com.markit.ondemand.auth.apiman.plugins.pingfed_oauth_policy.PingFedOauthPolicy$2.handle(PingFedOauthPolicy.java:174) 2017-01-05 18:28:49,096 ERROR [stderr] (default task-17) at io.apiman.gateway.platforms.servlet.components.HttpClientRequestImpl.end(HttpClientRequestImpl.java:140) 2017-01-05 18:28:49,096 ERROR [stderr] (default task-17) at com.markit.ondemand.auth.apiman.plugins.pingfed_oauth_policy.PingFedOauthPolicy.retrieveAccessTokenFromPing(PingFedOauthPolicy.java:232) 2017-01-05 18:28:49,096 ERROR [stderr] (default task-17) at com.markit.ondemand.auth.apiman.plugins.pingfed_oauth_policy.PingFedOauthPolicy.retrieveAccessTokenFromPing(PingFedOauthPolicy.java:174) 2017-01-05 18:28:49,096 ERROR [stderr] (default task-17) at com.markit.ondemand.auth.apiman.plugins.pingfed_oauth_policy.PingFedOauthPolicy.doApply(PingFedOauthPolicy.java:83) 2017-01-05 18:28:49,096 ERROR [stderr] (default task-17) at com.markit.ondemand.auth.apiman.plugins.pingfed_oauth_policy.PingFedOauthPolicy.doApply(PingFedOauthPolicy.java:38) My plugin is making either an external request to ElasticSearch or an HTTP request using IHttpClientComponent and then calling chain.doApply or chain.doFailure from within the IAsyncResultHandler handle method. Is there a problem with that pattern? Any help you can provide would be great. Thanks, [IHS Markit]<https://ihsmarkit.com/> David Rush Director, API Development | Markit Digital 5775 Flatiron Parkway | Boulder, CO 80301 P: +1 303 583 4244 Main: +1 303 417 9999 david.rush@ihsmarkit.com<mailto:david.rush@ihsmarkit.com> ________________________________ This e-mail, including accompanying communications and attachments, is strictly confidential and only for the intended recipient. Any retention, use or disclosure not expressly authorised by Markit is prohibited. This email is subject to all waivers and other terms at the following link: http://www.markit.com/en/about/legal/email-disclaimer.page Please visit http://www.markit.com/en/about/contact/contact-us.page for contact information on our offices worldwide.