Matyas Orhidi created KNOX-2543:
-----------------------------------
Summary: Intermittent NoHttpResponseException errors
Key: KNOX-2543
URL: https://issues.apache.org/jira/browse/KNOX-2543
Project: Apache Knox
Issue Type: Bug
Reporter: Matyas Orhidi
I'd like to request some sort of retry logic to handle intermittent backend
errors (in non-ha cases)
For example:
```
2021-02-25 15:00:29,768 WARN knox.gateway
(DefaultDispatch.java:executeOutboundRequest(184)) - Connection exception
dispatching request: https://xxx.com:8001/security_settings?doAs=knoxui
org.apache.http.NoHttpResponseException: xxx.com:8001 failed to respond
org.apache.http.NoHttpResponseException: xxx.com:8001 failed to respond
at
org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:141)
at
org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:56)
at
org.apache.http.impl.io.AbstractMessageParser.parse(AbstractMessageParser.java:259)
at
org.apache.http.impl.DefaultBHttpClientConnection.receiveResponseHeader(DefaultBHttpClientConnection.java:163)
at
org.apache.http.impl.conn.CPoolProxy.receiveResponseHeader(CPoolProxy.java:157)
at
org.apache.http.protocol.HttpRequestExecutor.doReceiveResponse(HttpRequestExecutor.java:273)
at
org.apache.http.protocol.HttpRequestExecutor.execute(HttpRequestExecutor.java:125)
at
org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:272)
at
org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:186)
at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:89)
at
org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110)
at
org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:185)
at
org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:83)
at
org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:108)
at
org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:56)
at
org.apache.knox.gateway.dispatch.DefaultDispatch.executeOutboundRequest(DefaultDispatch.java:167)
at
org.apache.knox.gateway.dispatch.DefaultDispatch.executeRequest(DefaultDispatch.java:153)
at
org.apache.knox.gateway.dispatch.DefaultDispatch.executeRequestWrapper(DefaultDispatch.java:136)
at
org.apache.knox.gateway.dispatch.DefaultDispatch.doGet(DefaultDispatch.java:303)
at
org.apache.knox.gateway.dispatch.GatewayDispatchFilter$GetAdapter.doMethod(GatewayDispatchFilter.java:174)
at
org.apache.knox.gateway.dispatch.GatewayDispatchFilter.doFilter(GatewayDispatchFilter.java:125)
at
org.apache.knox.gateway.filter.AbstractGatewayFilter.doFilter(AbstractGatewayFilter.java:58)
```
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