Apache PoolingHttpClientConnectionManager 抛出非法状态异常 [英] Apache PoolingHttpClientConnectionManager throwing illegal state exception
问题描述
这是我如何使用它 -
Here is how I use it -
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();
我还在 http GET 周围放置了一个 finally 块 -
ALso I have put a finally block around http GET -
finally {
try {
httpClient.close();
} catch (IOException e) {
LOGGER.error(e.getMessage());
}
}
这是我的堆栈跟踪 -
Here is my stacktrace -
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.A.B.C.CustomHttpClient.doGETAndValidate(CustomHttpClient.java:44)
at com.A.B.C.SiteMonitorTask.monitorAndUpdateEndPoints(SiteMonitorTask.java:48)
at com.A.B.C.SiteMonitorTask.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
I am using Quartz to schedule a job of monitoring Http end points.. Here is my connection pool configuration
totalMaxHttpConn=200
maxHttpConnPerRoute=20
Maven 依赖.. 工件版本
Maven dependency.. artifact version
httpclient 4.3.1
httpcore 4.3.1
EDIT - 好吧,问题没有在 finally 块中关闭 CloseableHttpClient 就解决了.. 谁能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?
EDIT - Well the problem got away by not closing CloseableHttpClient in the finally block.. Can anyone tell why is it behaving like that? Why is connection pool shut down if i close a client?
上面的closeablehttpclient是池的句柄而不是单个conn吗
推荐答案
此行为是由于 HC 4.3 中的错误所致.它已在 HC 4.4a1 中修复.从 4.4 开始,CloseableHttpClient#close
应该仅在客户端独占时自动关闭连接池
This behavior is due to a bug in HC 4.3. It has already been fixed in HC 4.4a1. As of 4.4 CloseableHttpClient#close
should automatically shut down the connection pool only if exclusively owned by the client
这篇关于Apache PoolingHttpClientConnectionManager 抛出非法状态异常的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!