java.net.SocketException: Software caused connection abort: socket write error

用Java客户端程序访问Java Web服务器时出错：

java.net.SocketException: Software caused connection abort: socket write error
    at java.net.SocketOutputStream.socketWrite0(Native Method)
    at java.net.SocketOutputStream.socketWrite(Unknown Source)
    at java.net.SocketOutputStream.write(Unknown Source)
    at org.apache.http.impl.io.AbstractSessionOutputBuffer.flushBuffer(AbstractSessionOutputBuffer.java:159)
    at org.apache.http.impl.io.AbstractSessionOutputBuffer.write(AbstractSessionOutputBuffer.java:179)
    at org.apache.http.impl.io.ContentLengthOutputStream.write(ContentLengthOutputStream.java:115)
    at org.apache.http.impl.io.ContentLengthOutputStream.write(ContentLengthOutputStream.java:122)
    at org.apache.http.entity.StringEntity.writeTo(StringEntity.java:168)
    at org.apache.http.entity.HttpEntityWrapper.writeTo(HttpEntityWrapper.java:89)
    at org.apache.http.impl.client.EntityEnclosingRequestWrapper$EntityWrapper.writeTo(EntityEnclosingRequestWrapper.java:108)
    at org.apache.http.impl.entity.EntitySerializer.serialize(EntitySerializer.java:117)
    at org.apache.http.impl.AbstractHttpClientConnection.sendRequestEntity(AbstractHttpClientConnection.java:265)
    at org.apache.http.impl.conn.ManagedClientConnectionImpl.sendRequestEntity(ManagedClientConnectionImpl.java:203)
    at org.apache.http.protocol.HttpRequestExecutor.doSendRequest(HttpRequestExecutor.java:236)
    at org.apache.http.protocol.HttpRequestExecutor.execute(HttpRequestExecutor.java:121)
    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 com.health_room_client.Communication.Commnunicator.send2Server(Commnunicator.java:44)
    at com.health_room_client.OperFrame.Function.sendRSAKey(Function.java:56)
    at com.health_room_client.OperFrame.MainFrame.main(MainFrame.java:192)

原来是防火墙的原因，把防火墙关了就正常了。