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37 for notmuch@notmuchmail.org; Sat, 27 Feb 2016 21:05:25 +0100
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38 From: Eric J <eric@deptj.eu>
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39 Subject: Re: Lost updates to Notmuch database
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86 On Sun, 21 Feb 2016 13:57:30 +0100 (CET), Eric J <eric@deptj.eu> wrote:
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87 > On Wed, 17 Feb 2016 21:44:23 +0100 (CET), Eric J <eric@deptj.eu> wrote:
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88 > > Using the API, I am adding single mail files, already in the maildir, to
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89 > > the Notmuch database and tagging them. It works, every time, as long as
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90 > > I run it one file at a time.
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92 > > However, if I do it twice, in different processes, at the same time, one
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93 > > file is added and tagged properly, the other is not (totally unfindable
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94 > > by notmuch search). Neither process reports any error, and they both log
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95 > > their actions normally. Actually a third simultaneous process also fails
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96 > > to leave any result in the database.
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99 > > The wrapper around the API for Tcl is very simple, and I can not see any
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100 > > way for that or Tcl itself to cause this sort of problem. Beyond this,
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101 > > I haven't thought of any way to decide if this could be a Notmuch problem
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102 > > or a Xapian problem.
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105 > Well, after some experimenting, this is not specific to Notmuch at all.
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106 > Xapian itself has Tcl bindings, and they also silently fail to lock the
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107 > file. So does putting a minimally changed copy of Xapian's locking code
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108 > directly in a Tcl extension, though that code works when called from a
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109 > tiny C main program instead.
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111 > So thanks for looking, I will report here if I find out why.
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113 Well, this seems to be a Tcl problem, not present in 8.5, but present in
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114 8.6, up until the very new 8.6.5rc2, where it seems to work. Sadly, I
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115 still have no explanation of the problem.
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