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Re: CRC-checksum failed in gzip

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Date Wed, 01 Aug 2012 19:57:19 +0200
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Subject Re: CRC-checksum failed in gzip
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>> Make sure that file objects are not shared between threads. If that is
>> possible. It will probably solve the problem (if that is related to
>> threads).
>
> Well I just have to create a lock I guess right?
That is also a solution. You need to call file.read() inside an acquired 
lock.
> with lock:
>      # open file
>      # read content
>
But not that way! Your example will keep the lock acquired for the 
lifetime of the file, so it cannot be shared between threads.

More likely:

## Open file
lock = threading.Lock()
fin = gzip.open(file_path...)
# Now you can share the file object between threads.

# and do this inside any thread:
## data needed. block until the file object becomes usable.
with lock:
     data = fin.read(....) # other threads are blocked while I'm reading
## use your data here, meanwhile other threads can read

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Thread

Re: CRC-checksum failed in gzip andrea crotti <andrea.crotti.0@gmail.com> - 2012-08-01 14:01 +0100
  Re: CRC-checksum failed in gzip Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-01 16:17 +0000
    Re: CRC-checksum failed in gzip andrea crotti <andrea.crotti.0@gmail.com> - 2012-08-01 17:38 +0100
    Re: CRC-checksum failed in gzip Laszlo Nagy <gandalf@shopzeus.com> - 2012-08-01 19:05 +0200
    Re: CRC-checksum failed in gzip andrea crotti <andrea.crotti.0@gmail.com> - 2012-08-01 18:17 +0100
    Re: CRC-checksum failed in gzip Laszlo Nagy <gandalf@shopzeus.com> - 2012-08-01 19:57 +0200
      Re: CRC-checksum failed in gzip Ulrich Eckhardt <ulrich.eckhardt@dominolaser.com> - 2012-08-02 10:49 +0200
        Re: CRC-checksum failed in gzip Laszlo Nagy <gandalf@shopzeus.com> - 2012-08-02 12:14 +0200
    Re: CRC-checksum failed in gzip andrea crotti <andrea.crotti.0@gmail.com> - 2012-08-02 10:26 +0100
    Re: CRC-checksum failed in gzip Laszlo Nagy <gandalf@shopzeus.com> - 2012-08-02 12:21 +0200
    Re: CRC-checksum failed in gzip andrea crotti <andrea.crotti.0@gmail.com> - 2012-08-02 11:57 +0100
    Re: CRC-checksum failed in gzip andrea crotti <andrea.crotti.0@gmail.com> - 2012-08-02 11:59 +0100

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