Issue Summary

During Bitbucket Server to Cloud Migration, the migration of certain repositories are marked as INCOMPLETE.

This is reproducible on Data Center: Yes, intermittent

Steps to Reproduce

1. Create a new migration plan in BCMA
2. Pick a bunch of repositories to migrate
3. Run Migration
4. Migration plan finishes with multiple repositories marked as INCOMPLETE

Expected Results

• Migration completes successfully, OR
• BCMA shows an appropriate message on the screen to indicate why migration failed

Actual Results

• Migration fails with some repos marked as INCOMPLETE
• No message on screen
• Application log shows following error:

  2023-10-05 09:25:29,456 ERROR [bcma-6] UserName @JYC74Vx565x4999038x32 bpfd8g 10.54.204.93 "POST /rest/migration/latest/check/xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx HTTP/1.1" c.a.b.p.b.p.AsyncCheckExecutor Pre-flight execution error occurred [xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx::UserGroupValidation]
  java.util.concurrent.ExecutionException: com.atlassian.bitbucket.plugin.bcma.migrationservice.MigrationServiceServerErrorException: Communication error during migration
          at com.google.common.util.concurrent.AbstractFuture.getDoneValue(AbstractFuture.java:531)
          at com.google.common.util.concurrent.AbstractFuture.get(AbstractFuture.java:492)
          at com.google.common.util.concurrent.AbstractFuture$TrustedFuture.get(AbstractFuture.java:83)
          at com.atlassian.bitbucket.plugin.bcma.preflight.AsyncCheckExecutor$Companion.extractResult(AsyncCheckExecutor.kt:342)
          at com.atlassian.bitbucket.plugin.bcma.preflight.AsyncCheckExecutor$Companion.access$extractResult(AsyncCheckExecutor.kt:336)
          at com.atlassian.bitbucket.plugin.bcma.preflight.AsyncCheckExecutor$persistWhenDone$1.onFailure(AsyncCheckExecutor.kt:225)
          at com.google.common.util.concurrent.Futures$CallbackListener.run(Futures.java:1052)
          at com.atlassian.sal.core.executor.ThreadLocalDelegateRunnable.run(ThreadLocalDelegateRunnable.java:34)
          at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
          at java.util.concurrent.FutureTask.run(Unknown Source)
          at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(Unknown Source)
          at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source)
          at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
          at java.lang.Thread.run(Unknown Source)
          ... 1 frame trimmed
  Caused by: com.atlassian.bitbucket.plugin.bcma.migrationservice.MigrationServiceServerErrorException: Communication error during migration
          at com.atlassian.bitbucket.plugin.bcma.migrationservice.MigrationServiceExceptions.serverError(Exceptions.kt:41)
          at com.atlassian.bitbucket.plugin.bcma.migrationservice.MigrationServiceClient.runHandlingHttpCallExceptions(MigrationServiceClient.kt:576)
          at com.atlassian.bitbucket.plugin.bcma.migrationservice.MigrationServiceClient.execute(MigrationServiceClient.kt:561)
          at com.atlassian.bitbucket.plugin.bcma.migrationservice.MigrationServiceClient.userGroupValidation(MigrationServiceClient.kt:292)
          at com.atlassian.bitbucket.plugin.bcma.preflight.UserGroupValidationCheck.performCheck(UserGroupValidationCheck.kt:80)
          at com.atlassian.bitbucket.plugin.bcma.preflight.AsyncCheckExecutor.runCheck(AsyncCheckExecutor.kt:317)
          at com.atlassian.bitbucket.plugin.bcma.preflight.AsyncCheckExecutor.executeChecksListenable$lambda-15$lambda-13$lambda-10(AsyncCheckExecutor.kt:127)
          at com.google.common.util.concurrent.TrustedListenableFutureTask$TrustedFutureInterruptibleTask.runInterruptibly(TrustedListenableFutureTask.java:125)
          at com.google.common.util.concurrent.InterruptibleTask.run(InterruptibleTask.java:57)
          at com.google.common.util.concurrent.TrustedListenableFutureTask.run(TrustedListenableFutureTask.java:78)
          ... 8 common frames omitted
  

Workaround

• Check firewall settings for open ports
• Refresh cloud token