[ERROR] 2021-11-12 14:13:35.611 org.apache.dolphinscheduler.common.utils.OSUtils:[175] - /etc/passwd (Too many open files)
java.io.FileNotFoundException: /etc/passwd (Too many open files)
        at java.io.FileInputStream.open0(Native Method)
        at java.io.FileInputStream.open(FileInputStream.java:195)
        at java.io.FileInputStream.<init>(FileInputStream.java:138)
        at java.io.FileInputStream.<init>(FileInputStream.java:93)
        at org.apache.dolphinscheduler.common.utils.OSUtils.getUserListFromLinux(OSUtils.java:189)
        at org.apache.dolphinscheduler.common.utils.OSUtils.getUserList(OSUtils.java:172)
        at org.apache.dolphinscheduler.server.worker.runner.TaskExecuteThread.run(TaskExecuteThread.java:139)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
[ERROR] 2021-11-12 14:13:35.611 org.apache.dolphinscheduler.server.worker.runner.TaskExecuteThread:[141] - tenantCode: root does not exist
[INFO] 2021-11-12 14:13:35.611 org.apache.dolphinscheduler.server.worker.runner.TaskExecuteThread:[232] - develop mode is: false
[ERROR] 2021-11-12 14:13:35.611 org.apache.dolphinscheduler.server.worker.runner.TaskExecuteThread:[252] - delete exec dir failed : Failed to list contents of /tmp/dolphinscheduler/exec/process/851650632065024/851651851886592_1/3524626/4979296
java.io.IOException: Failed to list contents of /tmp/dolphinscheduler/exec/process/851650632065024/851651851886592_1/3524626/4979296
        at org.apache.commons.io.FileUtils.cleanDirectory(FileUtils.java:1647)
        at org.apache.commons.io.FileUtils.deleteDirectory(FileUtils.java:1535)
        at org.apache.dolphinscheduler.server.worker.runner.TaskExecuteThread.clearTaskExecPath(TaskExecuteThread.java:249)
        at org.apache.dolphinscheduler.server.worker.runner.TaskExecuteThread.run(TaskExecuteThread.java:220)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)

[root@ds8 apache-dolphinscheduler-2.0.1-alpha-SNAPSHOT-bin]# ulimit -n
65535
[root@ds8 apache-dolphinscheduler-2.0.1-alpha-SNAPSHOT-bin]# jps
3767833 Jps
3767487 WorkerServer
[root@ds8 apache-dolphinscheduler-2.0.1-alpha-SNAPSHOT-bin]# lsof -p 3767487 | wc -l
66016