一切！我正在编写一个使用Graphs运行的java程序。代码需要用几个图表做一些事情。它工作正常，但是现在，每次启动程序时，它都会在完全执行15个方法之后停止，该方法逐个处理图形。之后，我在'CreateAllVertexCritical'方法的以下行中收到此错误：
FileWriter fr=new FileWriter(filename, true);
我找到的最有用的链接之一是这个（几乎相同的问题）： https://forums.oracle.com/message/8642300 但是，我无法解决这个问题。我关闭了我创建的所有Streams [请，如果我不对，请纠正我]。我还尝试增加打开文件数量的UBUNTU限制，但它没有帮助。 以下是我在main方法中调用的两种方法：
public synchronized static void CreateAllVertexCritical(File f, int nVertices) throws IOException {
isReady=false;
String s = f.getParent();
String name = f.getName();
File newDir = new File(s + "/Reduce" + name);
newDir.mkdir();
Path path = Paths.get(f.getAbsolutePath());
InputStream in = Files.newInputStream(path);
BufferedReader reader
= new BufferedReader(new InputStreamReader(in));
String line;
line = reader.readLine();
Matcher m = pat.matcher(line);
m.find();
m.find();
String s1 = m.group(2);
int edgeBr = Integer.parseInt(s1);
//if (edgeBr<54) return;
int newEdgeBr = edgeBr - 1;
//System.out.println(newEdgeBr);
String[] lastEdges = new String[edgeBr];
String filename = newDir.getPath() + "/1";
//File temp = new File(filename);
// System.out.println(temp.exists());
//System.out.println(filename);
FileWriter fr1=new FileWriter(filename, true);
pw = new PrintWriter(new BufferedWriter(fr1));
//System.out.println("p edge " + nVertices + " " + newEdgeBr + "\n");
pw.print(new String("p edge " + nVertices + " " + newEdgeBr + "\n"));
line = reader.readLine();
lastEdges[0] = line;
for (int l = 2; l <= edgeBr; l++) {
line = reader.readLine();
pw.print(line + "\n");
}
pw.flush();
fr1.close();
for (int j = 2; j <= edgeBr; j++) {
reader
= new BufferedReader(new InputStreamReader(Files.newInputStream(path)));
line = reader.readLine();
filename = s + "/Reduce" + name + "/" + j;
FileWriter fr=new FileWriter(filename, true);
pw = new PrintWriter(new BufferedWriter(fr));
pw.print(new String("p edge " + nVertices + " " + newEdgeBr + "\n"));
for (int l = 1; l < j; l++) {
line = reader.readLine();
pw.print(line + "\n");
}
line = reader.readLine();
lastEdges[j - 1] = line;
for (int l = j + 1; l <= edgeBr; l++) {
line = reader.readLine();
pw.print(line + "\n");
}
pw.flush();
fr.close();
}
for (int j = 1; j <= edgeBr; j++) {
try {
Process psmallk = Runtime.getRuntime().exec("/home/user/Desktop/SmallkSrc/smallk " + s + "/Reduce" + name + "/" + j + " 3 6");
psmallk.waitFor();
} catch (Exception ex) {
ex.printStackTrace();
}
File normalfile = new File(s + "/Reduce" + name + "/" + j);
File resfile = new File(s + "/Reduce" + name + "/" + j + ".res");
if (normalfile.exists() && (resfile.exists())) {
normalfile.delete();
resfile.delete();
} else {
Path dirPath = Paths.get("/media/user/1898016F98014CA6/F725/Reduce/ForTest14");
File dirFile = dirPath.toFile();
int count = dirFile.listFiles(filter).length;
count++;
Path tempPath = Paths.get("/media/user/1898016F98014CA6/F725/Reduce/ForTest14/" + count);
Files.copy(normalfile.toPath(), tempPath);
//sSystem.out.println(lastEdges[j-1]);
PrintWriter pwinfo = new PrintWriter(new BufferedWriter(new FileWriter(pinfo, true)));
pwinfo.print(count + " :" + lastEdges[j - 1] + "\n");
pwinfo.flush();
//CreateAllVertexCritical(normalfile, nVertices);
}
}
isReady=true;
}
public static void CreateAllVertexCriticalRecursive(File f, int n) throws IOException, InterruptedException {
//if(f.isDirectory()==true) return;
Path path = Paths.get(f.getAbsolutePath());
InputStream in = Files.newInputStream(path);
BufferedReader reader
= new BufferedReader(new InputStreamReader(in));
String line;
line = reader.readLine();
Matcher m = pat.matcher(line);
m.find();
m.find();
String s1 = m.group(2);
int edgeBr = Integer.parseInt(s1);
CreateAllVertexCritical(f, n);
while(isReady==false){TimeUnit.NANOSECONDS.sleep(100);}
String s = f.getParent();
String name = f.getName();
File newDir = new File(s + "/Reduce" + name);
File[] fileArr = newDir.listFiles(filter);
int brFiles = fileArr.length;
System.out.println(brFiles);
if (brFiles>4) System.out.println(newDir.getAbsolutePath() +": "+ brFiles);
if (brFiles > 0) {
for (int i = 0; i < brFiles; i++) {
//System.out.println("Fail "+ i+" "+ fileArr[i].getName());
CreateAllVertexCriticalRecursive(fileArr[i], n);
}
}
}
public static void main(String[] args) throws IOException, InterruptedException {
for(int u=120;u<9241;u++){ //1936 do 2000 missed
//if (u%3==0) System.gc();
System.out.println(u);
CreateAllVertexCriticalRecursive(new File("/media/user/1898016F98014CA6/F725/Temp/"+u), 14);
}