缓存文件找不到, 导致的死循环

[lizhibo0914]

正式项目中, 发现dubbo在运行中 ,出现了缓存文件找不到的现象出现了死循环, 疯狂打印日志, 导致cpu特别高, 一直循环打印: Failed to save registry store file, cause: 没有那个文件活目录

[Huangxuny1]

hello @lizhibo0914 ,

by given information , Failed to save registry store file, cause: 没有那个文件活目录 maybe print from AbstractRegistry.java

I am try to reproduce by a test in AbstractRegistryTest.java

    @Test
    public void testDoSaveProperties() throws NoSuchFieldException, IllegalAccessException, IOException {
        String defaultFilename = System.getProperty("user.home") + "/.dubbo/dubbo-registry-" + testUrl.getParameter(APPLICATION_KEY) + "-" + testUrl.getAddress().replaceAll(":", "-") + ".cache";
        File mockFile = spy(new File(defaultFilename));
        Field fileField = abstractRegistry.getClass().getSuperclass().getDeclaredField("file");
        fileField.setAccessible(true);
        fileField.set(abstractRegistry, mockFile);

        doReturn(false).when(mockFile).exists();
        doThrow(new IOException(" no such file or dir ")).when(mockFile).createNewFile();
        abstractRegistry.doSaveProperties(1);
    }

but I cannot reproduce it

it's output

[17/05/20 15:09:53:263 CST]  WARN support.AbstractRegistryTest$1:  [DUBBO] Failed to save registry cache file, will retry, cause:  no such file or dir , dubbo version: , current host: 192.168.1.83
java.io.IOException:  no such file or dir 
	at org.apache.dubbo.registry.support.AbstractRegistry.doSaveProperties(AbstractRegistry.java:187)
	at org.apache.dubbo.registry.support.AbstractRegistry$SaveProperties.run(AbstractRegistry.java:526)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at java.base/java.lang.Thread.run(Thread.java:834)
[17/05/20 15:09:53:263 CST]  WARN support.AbstractRegistryTest$1:  [DUBBO] Failed to save registry cache file, will retry, cause:  no such file or dir , dubbo version: , current host: 192.168.1.83
java.io.IOException:  no such file or dir 
	at org.apache.dubbo.registry.support.AbstractRegistry.doSaveProperties(AbstractRegistry.java:187)
	at org.apache.dubbo.registry.support.AbstractRegistry$SaveProperties.run(AbstractRegistry.java:526)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at java.base/java.lang.Thread.run(Thread.java:834)
[17/05/20 15:09:53:289 CST]  WARN support.AbstractRegistryTest$1:  [DUBBO] Failed to save registry cache file after retrying 3 times, cause:  no such file or dir , dubbo version: , current host: 192.168.1.83
java.io.IOException:  no such file or dir 
	at org.apache.dubbo.registry.support.AbstractRegistry.doSaveProperties(AbstractRegistry.java:187)
	at org.apache.dubbo.registry.support.AbstractRegistry$SaveProperties.run(AbstractRegistry.java:526)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at java.base/java.lang.Thread.run(Thread.java:834)

maybe it'd fixed in #3748

can you give a demo program to reproduce
or tell us more information such as dubbo version or StackTrace ?

[CrazyHZM]

No feedback for a long time, please close the issue temporarily. If there is still a problem, you can reopen it.