From 1cd071eae5d4cc10ae9ab3cc4b53eb19d2557ed2 Mon Sep 17 00:00:00 2001
From: Albert Louis Rossi <arossi@fnal.gov>
Date: Fri, 28 Jul 2023 08:57:31 -0500
Subject: [PATCH] dcache-xroot:  modify mkdir to ignore dir exists on make
 parent option

Motivation:

See https://github.com/dCache/dcache/issues/7256

`Possible extension for xrootd`

Modification:

Catch the file exists exception and ignore it
when the `createParents` option is true.

Result:

Result conforms to vanilla xroot server.

Target: master
Request: 9.1
Request: 9.0
Request: 8.2
Patch: https://rb.dcache.org/r/14031/
Closes: #7256
Requires-notes: yes
Acked-by: Dmitry
Acked-by: Tigran
---
 .../src/main/java/org/dcache/xrootd/door/XrootdDoor.java | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/modules/dcache-xrootd/src/main/java/org/dcache/xrootd/door/XrootdDoor.java b/modules/dcache-xrootd/src/main/java/org/dcache/xrootd/door/XrootdDoor.java
index 61a860c2ed1..31a70400010 100644
--- a/modules/dcache-xrootd/src/main/java/org/dcache/xrootd/door/XrootdDoor.java
+++ b/modules/dcache-xrootd/src/main/java/org/dcache/xrootd/door/XrootdDoor.java
@@ -774,7 +774,14 @@ public void createDirectory(FsPath path,
         }
 
         if (createParents) {
-            pnfsHandler.createDirectories(path);
+            try {
+                pnfsHandler.createDirectories(path);
+            } catch (FileExistsCacheException e) {
+                /*
+                 *  The behavior of the xroot vanilla server is to ignore this error
+                 *  for createParents.
+                 */
+            }
         } else {
             pnfsHandler.createPnfsDirectory(path.toString());
         }