[Moosefs-users] bug of mfsmaster

[Davies L. <dav...@gm...>]

Hi,

We found a bug in mfsmaster, in syslog:

structure error - edge->parent/parent->edges (node: 2109740 ; edge:
1406108512,guessstat-2011-09-26_00000 -> 2516019)

The parent 2516019 of node 2109740 not exists, It caused mfsmaster
start failed and mfsmetarestore failed.

It can been fixed by:

        e->parent = fsnodes_id_to_node(parent_id);
+        if (e->parent==NULL) {
+            // log
+            e->parent = fsnodes_id_to_node(1); // HACK
+        }
        if (e->parent==NULL) {

When can not found the parent of a node, then put the node in / instead.
After starting successfully, remove the file (unexpected node).

The real reason should been found, maybe when deleting dirs, one node
of its children
was in unusually status, been ignored.

-- 
 - Davies