lib-storage: mailbox_list_index_view_open() - Log a debug line why index isn't up...

diff --git a/src/lib-storage/list/mailbox-list-index.c b/src/lib-storage/list/mailbox-list-index.c
index 0cbaf3fdec1dc9853fafee26345b865e0aaea317..c13d8a07a596ae2918e7365a14541c0b650ae21c 100644 (file)
--- a/src/lib-storage/list/mailbox-list-index.c
+++ b/src/lib-storage/list/mailbox-list-index.c
@@ -733,6 +733,7 @@ int mailbox_list_index_view_open(struct mailbox *box, bool require_refreshed,
        struct mailbox_list_index *ilist = INDEX_LIST_CONTEXT(box->list);
        struct mailbox_list_index_node *node;
        struct mail_index_view *view;
+       const char *reason = NULL;
        uint32_t seq;
        int ret;
 
@@ -754,6 +755,8 @@ int mailbox_list_index_view_open(struct mailbox *box, bool require_refreshed,
        node = mailbox_list_index_lookup(box->list, box->name);
        if (node == NULL) {
                /* mailbox not found */
+               e_debug(box->event, "Couldn't open mailbox in list index: "
+                       "Mailbox not found");
                return 0;
        }
 
@@ -761,24 +764,32 @@ int mailbox_list_index_view_open(struct mailbox *box, bool require_refreshed,
        if (mailbox_list_index_need_refresh(ilist, view)) {
                /* mailbox_list_index_refresh_later() was called.
                   Can't trust the index's contents. */
+               reason = "Refresh-flag set";
                ret = 1;
        } else if (!mail_index_lookup_seq(view, node->uid, &seq)) {
                /* our in-memory tree is out of sync */
                ret = 1;
+               reason = "Mailbox no longer exists in index";
        } else if (!require_refreshed) {
                /* this operation doesn't need the index to be up-to-date */
                ret = 0;
        } else T_BEGIN {
                ret = box->v.list_index_has_changed == NULL ? 0 :
                        box->v.list_index_has_changed(box, view, seq, FALSE);
+               reason = "Mailbox has changed";
        } T_END;
 
        if (ret != 0) {
                /* error / mailbox has changed. we'll need to sync it. */
                if (ret < 0)
                        mailbox_list_index_refresh_later(box->list);
-               else
+               else {
+                       i_assert(reason != NULL);
+                       e_debug(box->event,
+                               "Couldn't open mailbox in list index: %s",
+                               reason);
                        ilist->index_last_check_changed = TRUE;
+               }
                mail_index_view_close(&view);
                return ret < 0 ? -1 : 0;
        }