在我的应用程序中，我正在发出 http get 和 http post 请求，在发出 40-50 个请求后，我收到以下错误异常。即使在进行调用后，http 连接似乎仍然打开太多文件。我在底部添加了 HTTP 异步处理程序及其用法。任何建议将不胜感激。感谢您花时间阅读本文。
10-01 23:08:53.214 30139-30321/com.app W/System.err﹕ org.apache.http.conn.HttpHostConnectException: Connection to http://152.125.228.214:8080 refused
10-01 23:08:53.220 30139-30321/com.app W/System.err﹕ at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:188)
10-01 23:08:53.229 30139-30139/com.app E/SharedPreferencesImpl﹕ Couldn't create directory for SharedPreferences file /data/data/com.app/shared_prefs/MY_SHARED_PREF.xml
10-01 23:08:53.232 30139-30321/com.app W/System.err﹕ at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:169)
10-01 23:08:53.232 30139-30321/com.app W/System.err﹕ at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:124)
10-01 23:08:53.232 30139-30321/com.app W/System.err﹕ at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:365)
10-01 23:08:53.232 30139-30321/com.app W/System.err﹕ at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:560)
10-01 23:08:53.232 30139-30321/com.app W/System.err﹕ at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:492)
10-01 23:08:53.233 30139-30321/com.app W/System.err﹕ at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:470)
10-01 23:08:53.233 30139-30321/com.app W/System.err﹕ at com.app.https.AsyncHttpTask.doInBackground(AsyncHttpTask.java:177)
10-01 23:08:53.233 30139-30321/com.app W/System.err﹕ at com.app.https.AsyncHttpTask.doInBackground(AsyncHttpTask.java:31)
10-01 23:08:53.233 30139-30321/com.app W/System.err﹕ at android.os.AsyncTask$2.call(AsyncTask.java:292)
10-01 23:08:53.233 30139-30321/com.app W/System.err﹕ at java.util.concurrent.FutureTask.run(FutureTask.java:237)
10-01 23:08:53.233 30139-30321/com.app W/System.err﹕ at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
10-01 23:08:53.233 30139-30321/com.app W/System.err﹕ at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
10-01 23:08:53.234 30139-30321/com.app W/System.err﹕ at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
10-01 23:08:53.234 30139-30321/com.app W/System.err﹕ at java.lang.Thread.run(Thread.java:818)
10-01 23:08:53.234 30139-30321/com.app W/System.err﹕ Caused by: java.net.ConnectException: socket failed: EMFILE (Too many open files)
10-01 23:08:53.235 30139-30321/com.app W/System.err﹕ at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:186)
10-01 23:08:53.235 30139-30321/com.app W/System.err﹕ ... 14 more
10-01 23:08:53.235 30139-30321/com.app W/System.err﹕ Caused by: java.net.SocketException: socket failed: EMFILE (Too many open files)
10-01 23:08:53.239 30139-30321/com.app W/System.err﹕ at libcore.io.IoBridge.socket(IoBridge.java:623)
10-01 23:08:53.239 30139-30321/com.app W/System.err﹕ at java.net.PlainSocketImpl.create(PlainSocketImpl.java:198)
10-01 23:08:53.239 30139-30321/com.app W/System.err﹕ at java.net.Socket.checkOpenAndCreate(Socket.java:687)
10-01 23:08:53.240 30139-30321/com.app W/System.err﹕ at java.net.Socket.connect(Socket.java:847)
10-01 23:08:53.240 30139-30321/com.app W/System.err﹕ at org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:124)
10-01 23:08:53.240 30139-30321/com.app W/System.err﹕ at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:149)
10-01 23:08:53.240 30139-30321/com.app W/System.err﹕ ... 14 more
10-01 23:08:53.240 30139-30321/com.app W/System.err﹕ Caused by: android.system.ErrnoException: socket failed: EMFILE (Too many open files)
10-01 23:08:53.241 30139-30321/com.app W/System.err﹕ at libcore.io.Posix.socket(Native Method)
10-01 23:08:53.241 30139-30321/com.app W/System.err﹕ at libcore.io.BlockGuardOs.socket(BlockGuardOs.java:282)
10-01 23:08:53.241 30139-30321/com.app W/System.err﹕ at libcore.io.IoBridge.socket(IoBridge.java:608)
10-01 23:08:53.241 30139-30321/com.app W/System.err﹕ ... 19 more
10-01 23:08:53.242 30139-30139/com.app D/com.app.util.JukeSpotUtils﹕ [ 10-01 23:08:54.556 191: 645 I/AudioFlinger ]
BUFFER TIMEOUT: remove(4101) from active list on thread 0xb5ae5008
以下是发出 HTTP 请求的代码。
public class AsyncHttpTask extends AsyncTask<String, Void, Response> {
private HttpHandler httpHandler;
private TaskCallback taskCallback;
private HTTPType httpType;
private String url;
private String json;
private NameValuePair[] headers;
public static final MediaType JSON = MediaType.parse("application/json; charset=utf-8");
public AsyncHttpTask(HttpHandler httpHandler, TaskCallback taskCallback, HTTPType httpType
, String url, String json) {
this.httpHandler = httpHandler;
this.taskCallback = taskCallback;
this.httpType = httpType;
this.url = url;
this.json = json;
}
@Override
protected void onPreExecute() {
if (taskCallback != null) {
taskCallback.onPreExecute();
}
}
@Override
protected Response doInBackground(String... arg0) {
InputStream inputStream = null;
Response responseToReturn = new Response("", 500);
try {
Response response = null;
HttpParams httpParameters = new BasicHttpParams();
HttpConnectionParams.setConnectionTimeout(httpParameters, 5000);
HttpConnectionParams.setSoTimeout(httpParameters, 10000);
HttpClient httpclient = new DefaultHttpClient(httpParameters);
HttpResponse httpResponse = httpclient.execute(httpHandler.getHttpRequestMethod());
inputStream = httpResponse.getEntity().getContent();
if (inputStream != null) {
response = new Response(convertInputStreamToString(inputStream), httpResponse.getStatusLine().getStatusCode());
} else {
response = new Response("Did not work :(", httpResponse.getStatusLine().getStatusCode());
}
responseToReturn = response;
} catch (Exception e) {
e.printStackTrace();
} finally {
if(inputStream != null) {
try {
inputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return responseToReturn;
}
@Override
protected void onPostExecute(Response response) {
if (taskCallback != null) {
taskCallback.onPostExecute();
}
httpHandler.onResponse(response);
}
private String convertInputStreamToString(InputStream inputStream) throws IOException {
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
String line = "";
String result = "";
while ((line = bufferedReader.readLine()) != null) {
result += line;
}
return result;
}
}
下面是一个抽象类，我用它来定义我自己的 HTTPGet 对象和 HTTPPost 对象的实现。
public abstract class HttpHandler {
public abstract HttpUriRequest getHttpRequestMethod();
public abstract void onResponse(Response result);
public void execute(TaskCallback taskCallback, HTTPType httpType, String url, String json) {
new AsyncHttpTask(this, taskCallback, httpType, url, json).execute();
}
}
以下是我如何在我编写的服务中使用 HttpHandler 的代码。
new HttpHandler() {
@Override
public HttpUriRequest getHttpRequestMethod() {
String refreshUrl = JukeSpotUtils.formRequestUrl(context,
context.getString(R.string.refresh_token_api));
HttpPost httpPost = new HttpPost(refreshUrl);
try {
JSONObject token = new JSONObject();
token.put("refreshToken", getPreferenceValue(context, context.getString(R.string.refresh_token)));
httpPost.setHeader("Content-Type", "application/json");
httpPost.setEntity(new StringEntity(token.toString()));
} catch (Exception e) {
e.printStackTrace();
}
return httpPost;
}
@Override
public void onResponse(Response response) {
if (response != null && response.isSuccessful()) {
try {
flushOldToken(context, response.getResult());
Log.d("ACCESS_TOKEN", getPreferenceValue(context, context.getString(R.string.access_token)));
if (simpleCallback != null) {
simpleCallback.callBack();
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
}.execute(null, HTTPType.POST, true);
最佳答案
您的连接没有正确关闭，或者您同时执行了许多 httpHandler。您可以尝试使用threadPoolExecutor来启动AsyncTask
关于java - Android - ErrnoException : socket failed: EMFILE (Too many open files) when making http requests，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/32914385/