[OAK-1921] Backup: "Attempt to read external blob" error

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.0, 1.0.1, 1.0.2
• Fix Version/s: 1.0.2, 1.1.0
• Component/s: segmentmk
• Assignee: Alex Deparvu
• Reporter: Thomas Mueller
• Created: 26/Jun/14 14:01
• Updated: 01/Oct/14 13:11
• Resolved: 08/Jul/14 07:35

Description

I tried to backup a segmentstore (with an external BlobStore) using

java -mx8g -jar oak-run-1.0.2-SNAPSHOT.jar backup segmentstore s2

and got:

Attempt to read external blob with blobId
[c184d2a3f1dbc709004a45ae6c5df7624c2ae653#32768] without specifying BlobStore
  at org.apache.jackrabbit.oak.plugins.segment.SegmentBlob.getReference(SegmentBlob.java:118)
  at org.apache.jackrabbit.oak.plugins.segment.SegmentWriter.writeBlob(SegmentWriter.java:706)
  at org.apache.jackrabbit.oak.plugins.segment.SegmentWriter.writeProperty(SegmentWriter.java:808)
  at org.apache.jackrabbit.oak.plugins.segment.SegmentWriter.writeProperty(SegmentWriter.java:796)

There are two options:

1) Adjust the backup code to work like compaction does, i.e. leave
external blobs as-is and perhaps output a message that informs the
user about the need to use a different mechanism to back up the
BlobStore contents

2) Add command line options for configuring the BlobStore to be used
for accessing external blobs.

Issue Links

• is blocked by: OAK-1932 TarMK compaction can create mixed segments