# Watcher slack alert not working **URL:** \ **Category:** Elasticsearch\ **Created:** [November 9, 2019, 4:13pm UTC](https://discuss.elastic.co/t/watcher-slack-alert-not-working/207214 "2019-11-09T16:13:38Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![mathur7vidit](https://avatars.discourse-cdn.com/v4/letter/m/d07c76/32.png) [@mathur7vidit](https://discuss.elastic.co/u/mathur7vidit)\ **Post date:** [November 9, 2019, 4:13pm UTC](https://discuss.elastic.co/t/watcher-slack-alert-not-working/207214/1 "2019-11-09T16:13:38Z")
Team, we have 6.8.4 setup and we are moving to 7.4.2. we have slack and email alerts configured. email alerts are working fine. whoever slack alerts are not working. attached is the error and elasticsearch.yml file. this took place after following the steps mentioned in 7.x upgrade wizard. getting below error [2019-11-09T15:31:26,078][ERROR][o.e.x.w.n.s.SlackService] [Hotdata-node-10.130.0.53] failed to execute slack api http request javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target at sun.security.ssl.Alerts.getSSLException(Alerts.java:192) ~[?:?] at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1946) ~[?:?] at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:316) ~[?:?] at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:310) ~[?:?] at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1639) ~[?:?] at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:223) ~[?:?] at sun.security.ssl.Handshaker.processLoop(Handshaker.java:1037) ~[?:?] at sun.security.ssl.Handshaker.process\_record(Handshaker.java:965) ~[?:?] at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1064) ~[?:?] at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1367) ~[?:?] at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1395) ~[?:?] at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1379) ~[?:?] at org.apache.http.conn.ssl.SSLConnectionSocketFactory.createLayeredSocket(SSLConnectionSocketFactory.java:394) ~[httpclient-4.5.2.jar:4.5.2] at org.apache.http.conn.ssl.SSLConnectionSocketFactory.connectSocket(SSLConnectionSocketFactory.java:353) ~[httpclient-4.5.2.jar:4.5.2] at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:141) ~[httpclient-4.5.2.jar:4.5.2] at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:353) ~[httpclient-4.5.2.jar:4.5.2] at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:380) ~[httpclient-4.5.2.jar:4.5.2] at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:236) ~[httpclient-4.5.2.jar:4.5.2] at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:184) ~[httpclient-4.5.2.jar:4.5.2] at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:88) ~[httpclient-4.5.2.jar:4.5.2] at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110) ~[httpclient-4.5.2.jar:4.5.2] at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:184) ~[httpclient-4.5.2.jar:4.5.2] at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82) ~[httpclient-4.5.2.jar:4.5.2] at org.elasticsearch.xpack.watcher.common.http.HttpClient.lambda$execute$0(HttpClient.java:175) ~[?:?] at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0\_222] at org.elasticsearch.xpack.core.common.socket.SocketAccess.doPrivileged(SocketAccess.java:32) ~[x-pack-core-6.8.4.jar:6.8.4] at org.elasticsearch.xpack.watcher.common.http.HttpClient.execute(HttpClient.java:175) ~[?:?] at org.elasticsearch.xpack.watcher.notification.slack.SlackAccount.send(SlackAccount.java:115) ~[?:?] at org.elasticsearch.xpack.watcher.notification.slack.SlackAccount.send(SlackAccount.java:69) ~[?:?] at org.elasticsearch.xpack.watcher.actions.slack.ExecutableSlackAction.execute(ExecutableSlackAction.java:50) ~[?:?] at org.elasticsearch.xpack.core.watcher.actions.ActionWrapper.execute(ActionWrapper.java:144) ~[x-pack-core-6.8.4.jar:6.8.4] at org.elasticsearch.xpack.watcher.execution.ExecutionService.executeInner(ExecutionService.java:526) ~[x-pack-watcher-6.8.4.jar:6.8.4] at org.elasticsearch.xpack.watcher.execution.ExecutionService.execute(ExecutionService.java:308) ~[x-pack-watcher-6.8.4.jar:6.8.4] at org.elasticsearch.xpack.watcher.execution.ExecutionService.lambda$executeAsync$5(ExecutionService.java:414) ~[x-pack-watcher-6.8.4.jar:6.8.4] at org.elasticsearch.xpack.watcher.execution.ExecutionService$WatchExecutionTask.run(ExecutionService.java:615) [x-pack-watcher-6.8.4.jar:6.8.4] at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingRunnable.run(ThreadContext.java:681) [elasticsearch-6.8.4.jar:6.8.4] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0\_222] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0\_222] at java.lang.Thread.run(Thread.java:748) [?:1.8.0\_222] Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:397) ~[?:?] at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:302) ~[?:?] at sun.security.validator.Validator.validate(Validator.java:262) ~[?:?] at sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:330) ~[?:?] at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:237) ~[?:?] at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:132) ~[?:?] at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1621) ~[?:?] ... 34 more ---
**Author:** ![mathur7vidit](https://avatars.discourse-cdn.com/v4/letter/m/d07c76/32.png) [@mathur7vidit](https://discuss.elastic.co/u/mathur7vidit)\ **Post date:** [November 15, 2019, 7:46am UTC](https://discuss.elastic.co/t/watcher-slack-alert-not-working/207214/2 "2019-11-15T07:46:38Z")
it got resolved. es was verifying certificate for slack as well, changed verification mode from certificate to none. xpack.http.ssl.verification\_mode: none ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [December 13, 2019, 7:46am UTC](https://discuss.elastic.co/t/watcher-slack-alert-not-working/207214/3 "2019-12-13T07:46:43Z")
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