Overall I was quite pleased with how the training went. There were more people involved that I expected: 40+ were in attendance physically at the Regenstrief building at some point during the week and another 10-15 that participated via the online web casts! One very positive outcome from the week was that Darius and I created a lot of wiki pages directly from the content we were talking about. This gave us a blueprint from which to talk while preserving the content for future users to see. I am still waiting to hear from Michael about the long-term availability of daily recordings.

I really see these types of trainings being a good long term revenue stream for OpenMRS. Obviously it won’t be able to be the only source, but if we had 3-4 trainings a year at various locations around the globe we would be able to hit a large number of developers. (Doing an implementer-centered training is a whole other matter) We learned a lot through this training: get the word out earlier, give out pre-training required reading, and write the entire week’s lesson plans prior to starting the training!

Tuwei was running v5.0.17 of MySQL. Upgrading to version 5.1.31 made the problem disappear.

WARN – InitializationFilter$InitializationCompletion$1.run(823) |2009-10-02 15:24:21,000| Error while trying to update to the latest database version
org.openmrs.util.DatabaseUpdateException: There was an error while updating the database to the latest. file: liquibase-update-to-latest.xml. Error: Migration failed for change set liquibase-update-to-latest.xml::2::upul:
Reason:
java.sql.SQLException: Can’t create/write to file ‘C:\WINDOWS\TEMP\#sql_fe4_0.MYI’ (Errcode: 17):
Caused By: Precondition Error
at org.openmrs.util.DatabaseUpdater.executeChangelog(DatabaseUpdater.java:145)
at org.openmrs.web.filter.initialization.InitializationFilter$InitializationCompletion$1.run(InitializationFilter.java:817)
at java.lang.Thread.run(Unknown Source)
Caused by: liquibase.exception.MigrationFailedException: Migration failed for change set liquibase-update-to-latest.xml::2::upul:
Reason:
java.sql.SQLException: Can’t create/write to file ‘C:\WINDOWS\TEMP\#sql_fe4_0.MYI’ (Errcode: 17):
Caused By: Precondition Error
at liquibase.ChangeSet.execute(ChangeSet.java:204)
at liquibase.parser.visitor.UpdateVisitor.visit(UpdateVisitor.java:26)
at org.openmrs.util.DatabaseUpdater$1OpenmrsUpdateVisitor.visit(DatabaseUpdater.java:177)
at liquibase.parser.ChangeLogIterator.run(ChangeLogIterator.java:41)
at org.openmrs.util.DatabaseUpdater.executeChangelog(DatabaseUpdater.java:201)
at org.openmrs.util.DatabaseUpdater.executeChangelog(DatabaseUpdater.java:142)
… 2 more
Caused by: liquibase.exception.PreconditionErrorException: Precondition Error
at liquibase.preconditions.ForeignKeyExistsPrecondition.check(ForeignKeyExistsPrecondition.java:36)
at liquibase.preconditions.NotPrecondition.check(NotPrecondition.java:18)
at liquibase.preconditions.AndPrecondition.check(AndPrecondition.java:21)
at liquibase.ChangeSet.execute(ChangeSet.java:169)
… 7 more

• branch> svn merge from trunk [rev_last_merged_from_trunk]:[HEAD]
• branch> (resolve conflicts, deploy, test)
• branch> commit
  (at this point, the branch should be exactly what trunk has plus all changes done in the branch)

• trunk> svn merge from branch [rev_first_branched_from_trunk]:[HEAD]

For some reason svn still sees a ton of conflicts when doing that last step. In the past I would have to manually go through each file and just copy what was in the branch on top of trunk and then “mark resolved”. However, now there is a faster way: Using at least SVN v1.5 at command line:

svn resolve -R –accept theirs-full *

Thats it! Its a life saver. Or at least a time saver.

(This can be dangerous. Make sure you have resolved all true conflicts in the branch before doing the “resolve all”)

I was lucky that I have control over the server and could change the http/https to a simply proxy instead of redirecting.  If I didn’t, I would have had to catch the protocol change and refetch the new url.

It took me a while to find an answer for this because these keywords didn’t give many results on google: URLConnection HttpURLConnection openConnection() connect() getInputStream() Apache redirectMatch 301 302.