httpclientでNoHttpResponseException異常が発生した場合の解決方法
2405 ワード
転載先:https://www.2cto.com/kf/201710/688548.html
httpclientバージョン:4.5.2
プロジェクトの実際の運行中、偶発異常:org.apache.http.NoHttpResponseException.
公式サイトの説明は次のとおりです.
In some circumstances, usually when under heavy load, the web server may be able to receive requests but unable to process them. A lack of sufficient resources like worker threads is a good example. This may cause the server to drop the connection to the client without giving any response. HttpClient throws NoHttpResponseException when it encounters such a condition. In most cases it is safe to retry a method that failed with NoHttpResponseException.
シナリオの変更:
httpclientバージョン:4.5.2
プロジェクトの実際の運行中、偶発異常:org.apache.http.NoHttpResponseException.
公式サイトの説明は次のとおりです.
In some circumstances, usually when under heavy load, the web server may be able to receive requests but unable to process them. A lack of sufficient resources like worker threads is a good example. This may cause the server to drop the connection to the client without giving any response. HttpClient throws NoHttpResponseException when it encounters such a condition. In most cases it is safe to retry a method that failed with NoHttpResponseException.
シナリオの変更:
CloseableHttpClient httpClient = HttpClients.custom() .setDefaultRequestConfig(config) .setConnectionManager(getPoolManager()) // ， ， retry // .setRetryHandler(new DefaultHttpRequestRetryHandler(3,true)) .setRetryHandler((exception, executionCount, context) -> { if (executionCount > 3 ) { log.warn( "Maximum tries reached for client http pool " ); return false ; } if (exception instanceof NoHttpResponseException //NoHttpResponseException || exception instanceof ConnectTimeoutException // // || exception instanceof SocketTimeoutException // ， ) { log.warn( "NoHttpResponseException on " + executionCount + " call" ); return true ; } return false ; }) .build();