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Re: Repairing a lmdb database

The language is Crystal which is still a very young language. It does not have threading at this time so there should be no issues with mutexes. While writing the code I never opened up a database but did repeatedly open up the environment and if the app ran into an error while coding didn't properly close the environment.

Howard while I have you on the line....

The documentation says to be very careful about closing databases and says it's not normally necessary. I am going to omit those calls from my wrapper. Is this OK?  I will probably omit a bunch of other calls too at least from the first release but I want to make sure I don't omit anything crucial.


On Tue, Nov 22, 2016 at 7:42 AM, Howard Chu <hyc@symas.com> wrote:
Tim Uckun wrote:
Hi All.

I am writing a wrapper for Lmdb for the Crystal language.  During the process
of writing my code started hanging when attempting to open a transaction.  At
first I thought I was calling the C functions wrong but it turned out to be
some sort of a corruption in the database itself. I deleted the database
directory and the code started working fine again.

Sounds like you're not using robust mutexes. Just a guess, since you didn't provide any info about your OS / platform or LMDB version.

  -- Howard Chu
  CTO, Symas Corp.           http://www.symas.com
  Director, Highland Sun     http://highlandsun.com/hyc/
  Chief Architect, OpenLDAP  http://www.openldap.org/project/