X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/bab30415501b92dbece93b636dda7f6914a123fa..fb429aa6a8dd1d28d08038abd8de8b9206a1d51e:/sdk/python/arvados/commands/federation_migrate.py

diff --git a/sdk/python/arvados/commands/federation_migrate.py b/sdk/python/arvados/commands/federation_migrate.py
index 0d39f4fc25..5c1bb29e76 100755
--- a/sdk/python/arvados/commands/federation_migrate.py
+++ b/sdk/python/arvados/commands/federation_migrate.py
@@ -22,6 +22,7 @@ import hmac
 import urllib.parse
 import os
 import hashlib
+import re
 from arvados._version import __version__
 
 EMAIL=0
@@ -294,7 +295,7 @@ def activate_remote_user(args, email, homearv, migratearv, old_user_uuid, new_us
             return None
 
     if olduser["is_admin"] and not newuser["is_admin"]:
-        print("(%s) Not migrating %s because user is admin but target user %s is not admin on %s. Please ensure the user admin status is the same on both clusters" % (email, old_user_uuid, new_user_uuid, migratecluster))
+        print("(%s) Not migrating %s because user is admin but target user %s is not admin on %s. Please ensure the user admin status is the same on both clusters. Note that a federated admin account has admin privileges on the entire federation." % (email, old_user_uuid, new_user_uuid, migratecluster))
         return None
 
     return newuser
@@ -316,7 +317,12 @@ def migrate_user(args, migratearv, email, new_user_uuid, old_user_uuid):
                                     new_owner_uuid=new_owner_uuid,
                                     redirect_to_new_user=True).execute()
     except arvados.errors.ApiError as e:
-        print("(%s) Skipping user migration because of error: %s" % (email, e))
+        name_collision = re.search(r'Key \(owner_uuid, name\)=\((.*?), (.*?)\) already exists\.\n.*UPDATE "(.*?)"', e._get_reason())
+        if name_collision:
+            target_owner, rsc_name, rsc_type = name_collision.groups()
+            print("(%s) Cannot migrate to %s because both origin and target users have a %s named '%s'. Please rename the conflicting items or use --data-into-subproject to migrate all users' data into a special subproject." % (email, target_owner, rsc_type[:-1], rsc_name))
+        else:
+            print("(%s) Skipping user migration because of error: %s" % (email, e))
 
 
 def main():