Apache PoolingHttpClientConnectionManager抛出非法状态exception

这是我如何使用它 –

private static final PoolingHttpClientConnectionManager connPool; static { connPool = new PoolingHttpClientConnectionManager(); // Increase max total connection to 200 connPool.setMaxTotal(200);//configurable through app.properties // Increase default max connection per route to 50 connPool.setDefaultMaxPerRoute(20);//configurable through app.properties } CloseableHttpClient httpClient = HttpClients.custom() .setConnectionManager(connPool) .build(); 

另外我在http GET周围放了一个finally块 –

 finally { try { httpClient.close(); } catch (IOException e) { LOGGER.error(e.getMessage()); } } 

这是我的堆栈跟踪 –

 java.lang.IllegalStateException: Connection pool shut down at org.apache.http.util.Asserts.check(Asserts.java:34) at org.apache.http.pool.AbstractConnPool.lease(AbstractConnPool.java:169) at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.requestConnection(PoolingHttpClientConnectionManager.java:217) at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:157) at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:194) at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:85) at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:108) at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:186) at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82) at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:106) at com.ABCCustomHttpClient.doGETAndValidate(CustomHttpClient.java:44) at com.ABCSiteMonitorTask.monitorAndUpdateEndPoints(SiteMonitorTask.java:48) at com.ABCSiteMonitorTask.run(SiteMonitorTask.java:37) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:744) 

我正在使用Quartz来安排监控Http端点的工作。这是我的连接池配置

 totalMaxHttpConn=200 maxHttpConnPerRoute=20 

Maven依赖..神器版本

 httpclient 4.3.1 httpcore 4.3.1 

编辑 – 通过不关闭finally块中的CloseableHttpClient来解决问题。任何人都可以告诉它为什么会这样？ 如果我关闭客户端，为什么连接池会关闭？

上面的closeablehttpclient是池的句柄而不是单个conn

Answer 1

此行为是由于HC 4.3中的错误。 它已在HC 4.4a1中修复。 从4.4开始， CloseableHttpClient#close只有在客户端独占时才会自动关闭连接池

Answer 2

在4.4版中，方法setConnectionManagerShared被添加到HttpClientBuilder中。 如果将其设置为true，则客户端将不会关闭连接管理器。

 HttpClients.custom() .setConnectionManager(Util.getConnectionManager()) // shared connection manager .setConnectionManagerShared(true)