# Not support spring cloud gateway? **URL:** \ **Category:** APM\ **Tags:** docker, java\ **Created:** [July 14, 2022, 2:19am UTC](https://discuss.elastic.co/t/not-support-spring-cloud-gateway/309595 "2022-07-14T02:19:49Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![user2022](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/user2022/32/126085_2.png) [@user2022](https://discuss.elastic.co/u/user2022)\ **Post date:** [July 14, 2022, 2:19am UTC](https://discuss.elastic.co/t/not-support-spring-cloud-gateway/309595/1 "2022-07-14T02:19:50Z")
we have an application using spring cloud gateway,and we find some problems on apm,seems like java agent do not support spring cloud gateway (yet) ? see below for details. **Kibana version** :7.17.3 **Elasticsearch version** :7.17.3 **APM Server version** :7.17.3 **APM Agent language and version** :Java 1.33.0 **Browser version** :Chrome **Original install method (e.g. download page, yum, deb, from source, etc.) and version**:docker **Fresh install or upgraded from other version?** fresh **Is there anything special in your setup?** just simple setup,no addition config **Description of the problem including expected versus actual behavior. Please include screenshots (if relevant)**: we use the following version of frameworks: JDK version: 11 Spring cloud gateway (SCG) version: 3.1.3 spring webflux version(from SCG): 5.3.20 reactor-netty(from spring webflux): 1.0.19 enhancement to our gateway: 1. we write filters, very simple filters(rewrite url, call redis etc..), which implents org.springframework.web.server.WebFilter (not scg's gatewayfilter, not good choice i know , for some reason i can't change..); 2. our gateway send outbound requests, just use scg's own feature, which calls reactor-netty directly(yes,they don't use their own webclient); after setup apm agent, run some requests to gateway, we don't get expected results: 1. the transaction is stated from spring webflux **dispatchhandler** , which means the **filters implements from webfilters are not captured** ; these filters are called from **defaultwebfilterchain** , which is in spring-web module, followed by reactor-netty, not arrive webflux yet. 2. gateway **outbound requests are missing** from apm,no http span. the requests use reactor-netty's httpclient directly, i think that's the cause, the elasic apm not support that framework. by contrast, opentelemetry's java agent works ok: filters, outbounds are captured, and kibana shows well. but we like elastic apm agent more, it has jvm metrics out of box, and excellent profile/central config features. so, is this true that elastic apm not support scg yet, or did i miss something? **Steps to reproduce** : 1. write simple scg applications 2. setup apm agent 3. run **Errors in browser console (if relevant)**: no error logs **Provide logs and/or server output (if relevant)**: nothing special from output ---
**Author:** ![Jack\_Shirazi](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jack_shirazi/32/91641_2.png) [@Jack\_Shirazi](https://discuss.elastic.co/u/Jack_Shirazi)\ **Post date:** [July 14, 2022, 12:06pm UTC](https://discuss.elastic.co/t/not-support-spring-cloud-gateway/309595/2 "2022-07-14T12:06:03Z")
I think your analysis is right. I'll reproduce it and see if there's anything obvious/easy to get something working, but I suspect it's a chunk of work ---
**Author:** ![Jack\_Shirazi](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jack_shirazi/32/91641_2.png) [@Jack\_Shirazi](https://discuss.elastic.co/u/Jack_Shirazi)\ **Post date:** [July 14, 2022, 2:30pm UTC](https://discuss.elastic.co/t/not-support-spring-cloud-gateway/309595/3 "2022-07-14T14:30:11Z")
Yes. My immediate impression is that it's not a quick thing. Options for you 1. You can add simplified instrumentation that works for you using our [plugin API](https://www.elastic.co/blog/create-your-own-instrumentation-with-the-java-agent-plugin) 2. You can instrument a few methods directly using the [trace\_methods](https://www.elastic.co/guide/en/apm/agent/java/current/config-core.html#config-trace-methods) option, eg -Delastic.apm.trace\_methods=reactor.netty.http.client.\*#send 3. The agent will correctly handle OpenTelemetry spans, so anything that creates those, like [this project](https://github.com/spring-projects-experimental/spring-cloud-sleuth-otel) which can be included could provide what you want I'll raise an issue to add instrumentation for the gateway and I'll discuss about the filters with my colleagues ---
**Author:** ![user2022](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/user2022/32/126085_2.png) [@user2022](https://discuss.elastic.co/u/user2022)\ **Post date:** [July 15, 2022, 12:29am UTC](https://discuss.elastic.co/t/not-support-spring-cloud-gateway/309595/4 "2022-07-15T00:29:09Z")
thank you for your response. i will try to use these options, and see if it works. ---
**Author:** ![user2022](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/user2022/32/126085_2.png) [@user2022](https://discuss.elastic.co/u/user2022)\ **Post date:** [July 29, 2022, 9:06am UTC](https://discuss.elastic.co/t/not-support-spring-cloud-gateway/309595/5 "2022-07-29T09:06:26Z")
Finally I wrote intrumentations using opentelmentry-api, now apm seems work as expected. I would like to share what i did, comments are welcome: 1. Instrument `org.springframework.http.server.reactive.ReactorHttpHandlerAdapter#apply` , create transaction on enter, so the filters implements from spring webfilter are captured; **However** , it conflict with elastic's official `spring-webflux` plugin, which create another transaction, but it does not have to. So dont enable the `experimental` flag happens to helped me... 2. Instrument `reactor.netty.http.client.HttpClient$ResponseReceiver#responseConnection` ，wrap `HttpClient.ResponseReceiver` and create span on `mapConnect`, so the outbounds are captured. These instruments have not yet fully tested. Can someone take a look on this, especially the `spring-webflux` plugin make some changes like 'only create transaction while the current context dont have one'? @Jack_Shirazi ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [August 19, 2022, 5:07am UTC](https://discuss.elastic.co/t/not-support-spring-cloud-gateway/309595/6 "2022-08-19T05:07:03Z")
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