如何解决Java HTTP 请求超时 2 分钟
我正在尝试从 Java 向 REST 服务进行 HTTP 调用。一切都很好,直到通话时间超过 120 秒。如果请求时间少于 120 秒,我可以成功地向同一服务发出请求。我的代码如下:
URL url = new URL("https://service.myurl.com/my-endpoint");
HttpURLConnection con = (HttpURLConnection) url.openConnection();
con.setRequestMethod("POST");
con.setRequestProperty("Content-Type","application/json; utf-8");
con.setReadTimeout(0);
con.setConnectTimeout(0);
con.setDoOutput(true);
con.setDoInput(true);
System.out.println(con.getReadTimeout() + "RT");
System.out.println(con.getConnectTimeout() + "CT");
System.out.println(System.getProperty("sun.net.client.defaultReadTimeout") + "SUN RT");
System.out.println(System.getProperty("sun.net.client.defaultConnectTimeout") + "SUN CT");
// System.out.println("Connection expires... " + con.getExpiration());
System.out.println("Getting output stream...");
System.out.println(System.getProperty("my-json"));
try (OutputStream os = con.getOutputStream()) {
byte[] input = System.getProperty("my-json").getBytes("utf-8");
os.write(input,input.length);
}
System.out.println("Getting response...");
StringBuilder response = null;
//
// THE REQUEST FAILS IN THE FOLLOWING LINE,// WHEN TRYING TO RETRIEVE THE INPUT STREAM
// WITH THE RESPONSE FROM THE SERVER
//
try (BufferedReader br = new BufferedReader(new InputStreamReader(con.getInputStream(),"utf-8"))) {
response = new StringBuilder();
String responseLine = null;
while ((responseLine = br.readLine()) != null) {
response.append(responseLine.trim());
}
System.out.println(response.toString());
}
我得到的例外情况如下:
javax.net.ssl|WARNING|01|main|2021-03-16 15:49:10.285 UTC|Logger.java:765|handling exception (
"throwable" : {
java.net.SocketException: Connection reset
at java.net.SocketInputStream.read(SocketInputStream.java:210)
at java.net.SocketInputStream.read(SocketInputStream.java:141)
at sun.security.ssl.SSLSocketInputRecord.read(SSLSocketInputRecord.java:457)
at sun.security.ssl.SSLSocketInputRecord.bytesInCompletePacket(SSLSocketInputRecord.java:68)
at sun.security.ssl.SSLSocketImpl.readApplicationRecord(SSLSocketImpl.java:1095)
at sun.security.ssl.SSLSocketImpl.access$200(SSLSocketImpl.java:72)
at sun.security.ssl.SSLSocketImpl$AppInputStream.read(SSLSocketImpl.java:815)
at java.io.BufferedInputStream.fill(BufferedInputStream.java:246)
at java.io.BufferedInputStream.read1(BufferedInputStream.java:286)
at java.io.BufferedInputStream.read(BufferedInputStream.java:345)
at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:735)
at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:678)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1593)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
at com.myurl.test.App.main(App.java:44)}
)
javax.net.ssl|SEVERE|01|main|2021-03-16 15:49:10.286 UTC|Logger.java:765|Fatal (UNEXPECTED_MESSAGE): Connection reset (
"throwable" : {
java.net.SocketException: Connection reset
at java.net.SocketInputStream.read(SocketInputStream.java:210)
at java.net.SocketInputStream.read(SocketInputStream.java:141)
at sun.security.ssl.SSLSocketInputRecord.read(SSLSocketInputRecord.java:457)
at sun.security.ssl.SSLSocketInputRecord.bytesInCompletePacket(SSLSocketInputRecord.java:68)
at sun.security.ssl.SSLSocketImpl.readApplicationRecord(SSLSocketImpl.java:1095)
at sun.security.ssl.SSLSocketImpl.access$200(SSLSocketImpl.java:72)
at sun.security.ssl.SSLSocketImpl$AppInputStream.read(SSLSocketImpl.java:815)
at java.io.BufferedInputStream.fill(BufferedInputStream.java:246)
at java.io.BufferedInputStream.read1(BufferedInputStream.java:286)
at java.io.BufferedInputStream.read(BufferedInputStream.java:345)
at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:735)
at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:678)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1593)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
at com.myurl.test.App.main(App.java:44)}
)
我已尝试将连接和读取超时设置为 0、最大整数值以及以下 JVM 参数...-Dsun.net.client.defaultReadTimeout=600000 -Dsun.net.client.defaultConnectTimeout=600000
(10 分钟)。没有什么对我有用。
我很确定问题出在 Java 的执行上,因为在同一台服务器上,使用 CURL 我能够执行相同的请求,这需要超过 2 分钟。
对此的任何帮助表示赞赏。
谢谢。
编辑 2021-03-16
服务能够接收请求并处理它。问题是当我们尝试从服务读取响应时。
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