Bugs item #1872685, was opened at 2008-01-16 12:38
Message generated for change (Comment added) made by cornuz
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Category: Core
Group: MonetDB4 CVS Head
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Roberto Cornacchia (cornuz)
Assigned to: Nobody/Anonymous (nobody)
Summary: PF(tijah): HEAPsetmmap: Assertion `p' failed.
Initial Comment:
.../gdk/gdk_bat.mx:2501: HEAPsetmmap: Assertion `p' failed.
This happens while indexing a (not small) xml file in pftijah.
It is relatively new, it did not happen before Xmas (same data, same
operations).
Not completely sure whether this is a M4 or a pftijah bug, but I saw some
recent changes to gdk_heap..
I enclose the script used to index (a part of) wikipedia collection in pftijah.
To reproduce the bug:
- run the server with pathfinder module
- MODIFY the 'DST' variable in the script
- run the scrip
I am running the head version of everything, compiled with default options and
32bit OID's.
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>Comment By: Roberto Cornacchia (cornuz)
Date: 2008-01-22 11:03
Message:
Logged In: YES
user_id=883451
Originator: YES
After some investigation,
I found out that the bug is triggered by the
commit in gdk_utils.mx, 1.200 -> 1.201, dated 14 Dec 2007:
- lower the threshold for creation of mmap-backed heaps to 64MB
[...]
Unfortunately this doesn't say much (to me, at least)
on the real cause of the problem.
Lowering the GDK_vm_minsize has probably had the effect of
triggering this bug earlier (i.e. with smaller data size)
than before the change.
About PF / PfTijah, it is indeed triggered by PfTijah and not by PF
alone:
Server:
$ Mserver --dbinit="module(pathfinder);"
Client:
$ echo 'pf:add-doc("/export/scratch0/roberto/wikipedia_XML/part-0.xml",
"part-0.xml")' | mclient -lx
[Succeeds]
$ echo "tijah:create-ft-index()" | mclient -lx
[Fails]
So, the bug shows up during PfTijah indexing.
----------------------------------------------------------------------
Comment By: Stefan Manegold (stmane)
Date: 2008-01-21 16:47
Message:
Logged In: YES
user_id=572415
Originator: NO
Indicate in the Summary, that this bug is triggered by Pathfinder; PFtijah
to be precise.
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