Alex install failure

[Simon Peyton Jones]

|  I have implemented this in wip/ghc-pkg-locking. Do you think you could give
|  this branch a try? If it still fails then we'll have to try to debug things
|  in-situ.

Alas, no go.

* I'm on wip/ghc-pkg-locking
* I checked that the lock file was removed

then I tried this:

simonpj at cam-05-unx:~/code/HEAD-2$ cabal install lens --with-ghc=/home/simonpj/5builds/HEAD-2/inplace/bin/ghc-stage2
Resolving dependencies...
Configuring base-orphans-0.6...
Configuring cabal-doctest-1.0.2...
Configuring call-stack-0.1.0...
Configuring fail-4.9.0.0...
Configuring hashable-1.2.6.1...
Configuring parallel-3.2.1.1...
Configuring prelude-extras-0.4.0.3...
Configuring primitive-0.6.2.0...
Configuring reflection-2.1.2...
Configuring semigroups-0.18.3...
Configuring stm-2.4.4.1...
Configuring th-abstraction-0.2.5.0...
Configuring transformers-compat-0.5.1.4...
Configuring void-0.7.2...
Building base-orphans-0.6...
Building cabal-doctest-1.0.2...
Building fail-4.9.0.0...
Building call-stack-0.1.0...
Building parallel-3.2.1.1...
Building hashable-1.2.6.1...
Building primitive-0.6.2.0...
Building prelude-extras-0.4.0.3...
Building reflection-2.1.2...
Building semigroups-0.18.3...
Building stm-2.4.4.1...
Building void-0.7.2...
Building th-abstraction-0.2.5.0...
Building transformers-compat-0.5.1.4...
Installed fail-4.9.0.0
Failed to install base-orphans-0.6
Build log ( /home/simonpj/.cabal/logs/base-orphans-0.6.log ):
cabal: Entering directory '/tmp/cabal-tmp-28239/base-orphans-0.6'
Configuring base-orphans-0.6...
Building base-orphans-0.6...
Preprocessing library base-orphans-0.6...
[1 of 2] Compiling Data.Orphans     ( src/Data/Orphans.hs, dist/build/Data/Orphans.o )
[2 of 2] Compiling Data.Orphans.Prelude ( src/Data/Orphans/Prelude.hs, dist/build/Data/Orphans/Prelude.o )
Creating package registration file:
/tmp/pkgConf-base-orphans-010599613932089018456.6
Installing library in
/home/simonpj/.cabal/lib/x86_64-linux-ghc-8.3.20170825/base-orphans-0.6-9iPDLrUqQ5yHb9fb9OUZ9L
Registering base-orphans-0.6...
cabal: '/home/simonpj/5builds/HEAD-2/inplace/bin/ghc-pkg' exited with an
error:
ghc-pkg: Couldn't open database
/home/simonpj/.ghc/x86_64-linux-8.3.20170825/package.conf.d for modification:
{handle:
/home/simonpj/.ghc/x86_64-linux-8.3.20170825/package.conf.d/package.cache.lock}:
hLock: invalid argument (Bad file descriptor)
cabal: Leaving directory '/tmp/cabal-tmp-28239/base-orphans-0.6'
Failed to install void-0.7.2
Build log ( /home/simonpj/.cabal/logs/void-0.7.2.log ):
cabal: Entering directory '/tmp/cabal-tmp-28252/void-0.7.2'
Configuring void-0.7.2...
Building void-0.7.2...
Preprocessing library void-0.7.2...
[1 of 1] Compiling Data.Void.Unsafe ( src/Data/Void/Unsafe.hs, dist/build/Data/Void/Unsafe.o )
Creating package registration file: /tmp/pkgConf-void-0.76281750111656478042.2
Installing library in
/home/simonpj/.cabal/lib/x86_64-linux-ghc-8.3.20170825/void-0.7.2-KNNEd7XG9bDRysTndgnf2
Registering void-0.7.2...
cabal: '/home/simonpj/5builds/HEAD-2/inplace/bin/ghc-pkg' exited with an
error:
ghc-pkg: Couldn't open database
/home/simonpj/.ghc/x86_64-linux-8.3.20170825/package.conf.d for modification:
{handle:
/home/simonpj/.ghc/x86_64-linux-8.3.20170825/package.conf.d/package.cache.lock}:
hLock: invalid argument (Bad file descriptor)
cabal: Leaving directory '/tmp/cabal-tmp-28252/void-0.7.2'
Failed to install semigroups-0.18.3
Build log ( /home/simonpj/.cabal/logs/semigroups-0.18.3.log ):
cabal: Entering directory '/tmp/cabal-tmp-28248/semigroups-0.18.3'
Configuring semigroups-0.18.3...
Building semigroups-0.18.3...
Preprocessing library semigroups-0.18.3...
[1 of 1] Compiling Data.Semigroup.Generic ( src/Data/Semigroup/Generic.hs, dist/build/Data/Semigroup/Generic.o )
Creating package registration file:
/tmp/pkgConf-semigroups-0.188594844211914544919.3
Installing library in
/home/simonpj/.cabal/lib/x86_64-linux-ghc-8.3.20170825/semigroups-0.18.3-9GRyDnRvoqO5HfdYR3Qz4o
Registering semigroups-0.18.3...
cabal: '/home/simonpj/5builds/HEAD-2/inplace/bin/ghc-pkg' exited with an
error:
ghc-pkg: Couldn't open database
/home/simonpj/.ghc/x86_64-linux-8.3.20170825/package.conf.d for modification:
{handle:
/home/simonpj/.ghc/x86_64-linux-8.3.20170825/package.conf.d/package.cache.lock}:
hLock: invalid argument (Bad file descriptor)
cabal: Leaving directory '/tmp/cabal-tmp-28248/semigroups-0.18.3'
  C-c C-c
simonpj at cam-05-unx:~/code/HEAD-2$

|  -----Original Message-----
|  From: Ben Gamari [mailto:ben at well-typed.com]
|  Sent: 24 August 2017 13:53
|  To: Simon Peyton Jones <simonpj at microsoft.com>
|  Cc: ghc-devs <ghc-devs at haskell.org>
|  Subject: RE: Alex install failure
|  
|  Simon Peyton Jones <simonpj at microsoft.com> writes:
|  
|  > | Hmm. Here's a shot in the dark: is home home directory mounted via
|  > | NFS by any chance?
|  >
|  > Direct hit! (for the shot in the dark). Yes it's NFS mounted I think.
|  > So what?
|  
|  Hi Simon,
|  
|  Sorry for the rather belated reply; I was knocked off my feet for a few days
|  by a rather nasty tetanus vaccination.
|  
|  Anyways, I have a patch which I suspect will help. It seems that some NFS
|  implementations incur a rather long delay (order of seconds) between the
|  time a file handle is closed and an open flock lock on the handle being
|  released. I suspect this delay won't exist in cases where we explicitly
|  funlock before closing the file handle.
|  
|  I have implemented this in wip/ghc-pkg-locking. Do you think you could give
|  this branch a try? If it still fails then we'll have to try to debug things
|  in-situ.
|  
|  Cheers,
|  
|  - Ben