Bug 338810

Description Daniel Weber 2011-03-03 08:37:42 EST

Build Identifier: M20100909-0800

I created a cquery + rmap where multiple components are locate din one git repo but in different subdirectories. I set up searchPaths in order to pick the right location depending on the component's id. Now when resolving, buckminster has trouble creating the local git clone.

Reproducible: Always

Steps to Reproduce:
1. Make sure the number of resolver threads is >1. AFAIK the default is 4
2. Resolve https://github.com/DanielWeber/org.eclipse.etrice/raw/master/releng/org.eclipse.etrice.releng.feature/etrice.cquery

This leads to various errors, for example:

ERROR   [0000] : No suitable provider for component org.eclipse.etrice.core.room.ui:osgi.bundle was found in resourceMap https://github.com/DanielWeber/org.eclipse.etrice/raw/master/releng/org.eclipse.etrice.releng.feature/etrice-git.rmap
  ERROR   [0000] : No suitable provider for component org.eclipse.etrice.core.room.ui:osgi.bundle was found in searchPath etrice.plugins
    ERROR   [0000] : Rejecting provider git({0}/org.eclipse.etrice,plugins/{1}[C:/Users/Daniel/workspace/default/org.eclipse.etrice,plugins/org.eclipse.etrice.core.room.ui]): No component match was found
      ERROR   java.io.IOException: Creating directory C:\Users\Daniel\workspace\default\org.eclipse.etrice\.git\refs failed
org.eclipse.etrice.generator.java:osgi.bundle: No provider was found that could resolve the request
ERROR   [0000] : No suitable provider for component org.eclipse.etrice.generator.java:osgi.bundle was found in resourceMap https://github.com/DanielWeber/org.eclipse.etrice/raw/master/releng/org.eclipse.etrice.releng.feature/etrice-git.rmap
  ERROR   [0000] : No suitable provider for component org.eclipse.etrice.generator.java:osgi.bundle was found in searchPath etrice.plugins
    ERROR   [0000] : Rejecting provider git({0}/org.eclipse.etrice,plugins/{1}[C:/Users/Daniel/workspace/default/org.eclipse.etrice,plugins/org.eclipse.etrice.generator.java]): No component match was found
      ERROR   java.io.IOException: Creating directory C:\Users\Daniel\workspace\default\org.eclipse.etrice\.git\refs failed
org.eclipse.etrice.ui.common:osgi.bundle: Rejecting provider git({0}/org.eclipse.etrice,plugins/{1}[C:/Users/Daniel/workspace/default/org.eclipse.etrice,plugins/org.eclipse.etrice.ui.common]): No component match was found
org.eclipse.etrice.ui.common:osgi.bundle: No provider was found that could resolve the request
ERROR   [0000] : No suitable provider for component org.eclipse.etrice.ui.common:osgi.bundle was found in resourceMap https://github.com/DanielWeber/org.eclipse.etrice/raw/master/releng/org.eclipse.etrice.releng.feature/etrice-git.rmap
  ERROR   [0000] : No suitable provider for component org.eclipse.etrice.ui.common:osgi.bundle was found in searchPath etrice.plugins
    ERROR   [0000] : Rejecting provider git({0}/org.eclipse.etrice,plugins/{1}[C:/Users/Daniel/workspace/default/org.eclipse.etrice,plugins/org.eclipse.etrice.ui.common]): No component match was found
      ERROR   org.eclipse.jgit.errors.MissingObjectException: Missing unknown cdbfab4f375c468e623908ee103af389ac951d38

The exceptions are not always the same, but it looks like multiple threads "collide" while trying to access the local clone.

The resolver threads should probably synchronize access to the same local git clone in some way.

Workaround: Set the number of resolver threads to 1 and errors go away.