How to Restore a Corrupted Tracker Database

CopyStorm/Restore uses a small footprint relational database (based on H2) to keep track of all restore activity. Like any database, it is possible (but rare) for this database to become corrupted. This article explains how to recover a corrupted H2 database.

Step 1: Create a New Directory and….

  1. Copy the corrupted H2 database into the new directory.
  2. Copy the file [CopyStormRestore Install Directory]/lib/h2*.jar into the new directory.
  3. Open a command prompt and run java -jar h2*.jar org.h2.tools.Recover
  4. The previous step will create a .txt file with the same name as your database. It may take a while to run and does not produce output.

Step 2: Replace the recovery file created into Step 1 into a new database.

java -cp h2*.jar org.h2.tools.RunScript -url “jdbc:h2:file:~/tmp/RecoveredTracker” -user root -password aslan -script EMR-UAT-tracker.mv.txt -showResults

  • The database in the -url parameter should not exist.
  • The -user and -password parameter should match a user in your corrupted database.
  • The -script argument is the recovery file created in the first step.

Step 3: Look at the recovered tracker database using the H2 Console application.

Step 4: Look at the recovered tracker database using CopyStorm/Restore.

Of course, there is no guarantee that the recovery will work. Each case is likely to be unique. However, if the following tables are intact and have data there is a decent chance of recovery.

  • RestoreConfig — this table must have values. It is used by CopyStorm/Restore to determine the version of the tracker database.
  • RestoreTable — this table lists all Salesforce tables in the tracker and references to a unique tracking table for each Salesforce table. Do a SELECT * on this table.
  • RestoreTableRecordReference — this is a utility table used to track reference ids that need to be patched in a second pass. It may or may not be empty but must exist.
  • SkippedRecordReason — this table can be empty but must exist.
  • RestoreException — this table can be empty but must exist.
  • RestoreHistory — this table can be empty but must exist.

See this article for details about what is in a tracker database.