phoenix-queryserver-it/src/it/java/org/apache/phoenix/end2end/SecureQueryServerPhoenixDBIT.java [168:177]:
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    private static void ensureIsEmptyDirectory(File f) throws IOException {
        if (f.exists()) {
            if (f.isDirectory()) {
                FileUtils.deleteDirectory(f);
            } else {
                assertTrue("Failed to delete keytab directory", f.delete());
            }
        }
        assertTrue("Failed to create keytab directory", f.mkdirs());
    }
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phoenix-queryserver-it/src/it/java/org/apache/phoenix/end2end/QueryServerEnvironment.java [188:197]:
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    private static void ensureIsEmptyDirectory(File f) throws IOException {
        if (f.exists()) {
            if (f.isDirectory()) {
                FileUtils.deleteDirectory(f);
            } else {
                assertTrue("Failed to delete keytab directory", f.delete());
            }
        }
        assertTrue("Failed to create keytab directory", f.mkdirs());
    }
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