Lost updates to Notmuch database

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+ for notmuch@notmuchmail.org; Wed, 17 Feb 2016 21:44:23 +0100\r
+From: Eric J <eric@deptj.eu>\r
+Subject: Lost updates to Notmuch database\r
+To: notmuch@notmuchmail.org\r
+Message-ID: <337393ce5e2484d64f837a44b2c4f2ea32f91295-NM@bruno.deptj.eu>\r
+Date: Wed, 17 Feb 2016 21:44:23 +0100 (CET)\r
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+\r
+Using the API, I am adding single mail files, already in the maildir, to\r
+the Notmuch database and tagging them. It works, every time, as long as\r
+I run it one file at a time. \r
+\r
+However, if I do it twice, in different processes, at the same time, one\r
+file is added and tagged properly, the other is not (totally unfindable\r
+by notmuch search). Neither process reports any error, and they both log\r
+their actions normally. Actually a third simultaneous process also fails\r
+to leave any result in the database.\r
+\r
+This is in spite of using begin_atomic/end_atomic. I would not have been\r
+surprised to get Xapian lock errors, but the database_open returns\r
+success, as does the database_begin_atomic. \r
+\r
+The wrapper around the API for Tcl is very simple, and I can not see any\r
+way for that or Tcl itself to cause this sort of problem. Beyond this,\r
+I haven't thought of any way to decide if this could be a Notmuch problem\r
+or a Xapian problem.\r
+\r
+The API sequence is:\r
+\r
+    database_open\r
+    database_begin_atomic\r
+    database_add_message\r
+    (next 4 are a for loop)\r
+    message_get_tags\r
+    tags_valid\r
+    tags_move_to_next\r
+    tags_get\r
+    message_freeze\r
+    message_add_tag\r
+    message_thaw\r
+    message_maildir_flags_to_tags\r
+    message_get_filename\r
+    message_get_message_id\r
+    database_end_atomic\r
+    message_destroy\r
+    database_close\r
+    database_destroy\r
+\r
+I didn't realise till it was mostly written, but it is pretty much like\r
+add_new() in notmuch-new.c .\r
+\r
+Eric\r
+-- \r
+ms fnd in a lbry\r