vagetablechicken opened a new issue #3282: Opening data dirs parallelly is not thread-safe URL: https://github.com/apache/incubator-doris/issues/3282 **Describe the bug** 162b1c5d8bfd8afb7b01951ea5c5a79d1ffe1679 makes the data dirs init parallelly, but I found it's not thread-safe. When be is starting, it may get this error: ``` [data_dir.cpp:249] fail to find file system, path=/xxx ``` I didn't notice that `DataDir::_init_file_system()` may have race conditions. `getmntent()` value is `MT-Unsafe race:mntentbuf locale` We have two solutions: 1. use `getmntent_r()` instread, `getmntent_r()` value is MT-Safe locale. 1. split `_init_meta()`(open rocksdb), just `_init_meta()` in parallel. Keep other parts of data dir init in sequential order.
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