jihoonson commented on a change in pull request #11879:
URL: https://github.com/apache/druid/pull/11879#discussion_r743873821
##########
File path: core/src/main/java/org/apache/druid/java/util/common/FileUtils.java
##########
@@ -379,6 +379,27 @@ public static File createTempDir(@Nullable final String
prefix)
}
}
+ /**
+ * Create "directory" and all intermediate directories as needed. If the
directory is successfully created, or already
+ * exists, returns quietly. Otherwise, throws an IOException.
+ *
+ * Simpler to use than {@link File#mkdirs()}, and more reliable since it is
safe from races where two threads try
Review comment:
This method seems similar to
`org.apache.commons.io.FileUtils.forceMkdir()` besides this handling for the
race, and so perhaps we can fix the anti-pattern if we have and use it instead
of adding a new method?
##########
File path: core/src/main/java/org/apache/druid/java/util/common/FileUtils.java
##########
@@ -379,6 +379,27 @@ public static File createTempDir(@Nullable final String
prefix)
}
}
+ /**
+ * Create "directory" and all intermediate directories as needed. If the
directory is successfully created, or already
+ * exists, returns quietly. Otherwise, throws an IOException.
+ *
+ * Simpler to use than {@link File#mkdirs()}, and more reliable since it is
safe from races where two threads try
Review comment:
Do we have this issue today? Or is this a future-proof? The race in
creating directory sounds like an anti-pattern because.. why not using a single
thread to prepare the directory and then letting other threads write their
files without race?
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