sweep: #7976 fix (DMS): workaround for xrootd setting rlimits

Author: chaen

src/DIRAC/Resources/Storage/GFAL2_StorageBase.py

@@ -27,6 +27,7 @@
 from urllib import parse
 
 from collections.abc import Iterator
+from resource import getrlimit, setrlimit, RLIMIT_NPROC
 from typing import cast, Literal, Union, Any, Optional
 
 import gfal2  # pylint: disable=import-error
@@ -138,7 +139,12 @@ def __init__(self, storageName: str, parameters: dict[str, str]):
             gfal2.set_verbose(gfal2.verbose_level.trace)
 
         # # gfal2 API
+        # Workaround for https://github.com/xrootd/xrootd/issues/2396
+        # xrootd internaly sets nproc, so we save the limit and reset it
+        # just after creating the context
+        saved_limits = getrlimit(RLIMIT_NPROC)
         self.ctx = gfal2.creat_context()
+        setrlimit(RLIMIT_NPROC, saved_limits)
 
         # by default turn off BDII checks
         self.ctx.set_opt_boolean("BDII", "ENABLE", False)