调用注册接口 报这个错The target server failed to respond

Caused by: org.apache.http.NoHttpResponseException: The target server failed to respond
at org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:143) ~
at org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:57) ~
at org.apache.http.impl.io.AbstractMessageParser.parse(AbstractMessageParser.java:260) ~
at org.apache.http.impl.AbstractHttpClientConnection.receiveResponseHeader(AbstractHttpClientConnection.java:283) ~
at org.apache.http.impl.conn.DefaultClientConnection.receiveResponseHeader(DefaultClientConnection.java:251) ~
at org.apache.http.impl.conn.ManagedClientConnectionImpl.receiveResponseHeader(ManagedClientConnectionImpl.java:197) ~
at org.apache.http.protocol.HttpRequestExecutor.doReceiveResponse(HttpRequestExecutor.java:271) ~
at org.apache.http.protocol.HttpRequestExecutor.execute(HttpRequestExecutor.java:123) ~
at org.apache.http.impl.client.DefaultRequestDirector.tryExecute(DefaultRequestDirector.java:682) ~
at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:486) ~
at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:863) ~
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82) ~
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:106) ~
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:57) ~
at com.mishi.common.util.http.HttpRequestProxy2.executeMethod(HttpRequestProxy2.java:309) ~
... 21 common frames omitted