[Bug 1366104] Re: OperationError when large object greater than 2gb

[Andres Rodriguez]

This does solve our problem because we are not SRU'ing MAAS, nor this
change to 12.04. This only affects where MAAS is hosted. In this case,
it only affects MAAS running in Utopic.

If MAAS 1.7 (Utopic's version) is SRU'd into Trusty, then we will
continue to see this issue. However, we have tested 2.4.5 in trusty,
with this patch and the latest version of MAAS and proven that this
works as expected:

In Trusty with psycopg 2.4.5 with the patch:

https://launchpad.net/~maas-
maintainers/+archive/ubuntu/experimental?field.series_filter=trusty

In Utopic with psycopg 2.5.3 with the patch:

https://launchpad.net/~maas-
maintainers/+archive/ubuntu/experimental?field.series_filter=utopic

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https://bugs.launchpad.net/bugs/1366104

Title:
  OperationError when large object greater than 2gb

Status in MAAS:
  Fix Committed
Status in “psycopg2” package in Ubuntu:
  Incomplete

Bug description:
  If a large object is greater than 2gb then calls to seek and tell will
  fail with an OperationError. This is because of the use of lseek and
  ltell instead of the lseek64 and ltell64.

  Attached is the upstream issue and pull request.

  https://github.com/psycopg/psycopg2/pull/259

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