Alerting Emails are triggering intermittently, in my kibana 7.8

Plugins Alerting
1

Hi All,

  1. I am using Kibana 7.8 and Elasticsearch 7.8 with opendistro plugins.
  2. I can see the triggered alerts on Kibana, but only few of the triggered alerts are notifying me over the Assyst mail.

below is the only error I can see in the Elasticsearch logs.

[2022-08-29T09:57:52,061][INFO ][c.a.o.a.m.MonitorRunResult] [es-master] Internal error: java.net.SocketTimeoutException: Read timed out. See the Elasticsearch.log for details
java.lang.IllegalStateException: java.net.SocketTimeoutException: Read timed out
        at com.amazon.opendistroforelasticsearch.alerting.destination.factory.CustomWebhookDestinationFactory.publish(CustomWebhookDestinationFactory.java:46) ~[alerting-notification-1.9.0.0.jar:?]
        at com.amazon.opendistroforelasticsearch.alerting.destination.factory.CustomWebhookDestinationFactory.publish(CustomWebhookDestinationFactory.java:29) ~[alerting-notification-1.9.0.0.jar:?]
        at com.amazon.opendistroforelasticsearch.alerting.destination.Notification.lambda$publish$0(Notification.java:44) ~[alerting-notification-1.9.0.0.jar:?]
        at java.security.AccessController.doPrivileged(AccessController.java:312) ~[?:?]
        at com.amazon.opendistroforelasticsearch.alerting.destination.Notification.publish(Notification.java:42) ~[alerting-notification-1.9.0.0.jar:?]
        at com.amazon.opendistroforelasticsearch.alerting.model.destination.Destination.publish(Destination.kt:177) ~[opendistro_alerting-1.9.0.0.jar:1.9.0.0]
        at com.amazon.opendistroforelasticsearch.alerting.MonitorRunner$runAction$2.invokeSuspend(MonitorRunner.kt:436) ~[opendistro_alerting-1.9.0.0.jar:1.9.0.0]
        at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:32) [kotlin-stdlib-1.3.21.jar:1.3.21-release-158 (1.3.21)]
        at kotlinx.coroutines.DispatchedTask.run(Dispatched.kt:233) [kotlinx-coroutines-core-1.1.1.jar:?]
        at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:594) [kotlinx-coroutines-core-1.1.1.jar:?]
        at kotlinx.coroutines.scheduling.CoroutineScheduler.access$runSafely(CoroutineScheduler.kt:60) [kotlinx-coroutines-core-1.1.1.jar:?]
        at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:742) [kotlinx-coroutines-core-1.1.1.jar:?]
Caused by: java.net.SocketTimeoutException: Read timed out
        at sun.nio.ch.NioSocketImpl.timedRead(NioSocketImpl.java:283) ~[?:?]
        at sun.nio.ch.NioSocketImpl.implRead(NioSocketImpl.java:309) ~[?:?]
        at sun.nio.ch.NioSocketImpl.read(NioSocketImpl.java:350) ~[?:?]
        at sun.nio.ch.NioSocketImpl$1.read(NioSocketImpl.java:803) ~[?:?]
        at java.net.Socket$SocketInputStream.read(Socket.java:982) ~[?:?]
        at org.apache.http.impl.io.SessionInputBufferImpl.streamRead(SessionInputBufferImpl.java:137) ~[httpcore-4.4.12.jar:4.4.12]
        at org.apache.http.impl.io.SessionInputBufferImpl.fillBuffer(SessionInputBufferImpl.java:153) ~[httpcore-4.4.12.jar:4.4.12]
        at org.apache.http.impl.io.SessionInputBufferImpl.readLine(SessionInputBufferImpl.java:280) ~[httpcore-4.4.12.jar:4.4.12]
        at org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:138) ~[httpclient-4.5.10.jar:4.5.10]
        at org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:56) ~[httpclient-4.5.10.jar:4.5.10]
        at org.apache.http.impl.io.AbstractMessageParser.parse(AbstractMessageParser.java:259) ~[httpcore-4.4.12.jar:4.4.12]
        at org.apache.http.impl.DefaultBHttpClientConnection.receiveResponseHeader(DefaultBHttpClientConnection.java:163) ~[httpcore-4.4.12.jar:4.4.12]
        at org.apache.http.impl.conn.CPoolProxy.receiveResponseHeader(CPoolProxy.java:157) ~[httpclient-4.5.10.jar:4.5.10]
        at org.apache.http.protocol.HttpRequestExecutor.doReceiveResponse(HttpRequestExecutor.java:273) ~[httpcore-4.4.12.jar:4.4.12]
        at org.apache.http.protocol.HttpRequestExecutor.execute(HttpRequestExecutor.java:125) ~[httpcore-4.4.12.jar:4.4.12]
        at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:272) ~[httpclient-4.5.10.jar:4.5.10]
        at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:186) ~[httpclient-4.5.10.jar:4.5.10]
        at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:89) ~[httpclient-4.5.10.jar:4.5.10]
        at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110) ~[httpclient-4.5.10.jar:4.5.10]
        at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:185) ~[httpclient-4.5.10.jar:4.5.10]
        at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:83) ~[httpclient-4.5.10.jar:4.5.10]
        at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:108) ~[httpclient-4.5.10.jar:4.5.10]
        at com.amazon.opendistroforelasticsearch.alerting.destination.client.DestinationHttpClient.getHttpResponse(DestinationHttpClient.java:129) ~[alerting-notification-1.9.0.0.jar:?]
        at com.amazon.opendistroforelasticsearch.alerting.destination.client.DestinationHttpClient.execute(DestinationHttpClient.java:94) ~[alerting-notification-1.9.0.0.jar:?]
        at com.amazon.opendistroforelasticsearch.alerting.destination.factory.CustomWebhookDestinationFactory.publish(CustomWebhookDestinationFactory.java:42) ~[alerting-notification-1.9.0.0.jar:?]
        ... 11 more

.

can you please help me with this email not triggering issue …

many thanx,