Issue
When running DataStore Garbage Collection (Blob GC on a FileDataStore), we see the markedTimestamp error below:
05.06.2017 21:50:22.425 *WARN* [pool-6-thread-19] org.apache.jackrabbit.oak.plugins.blob.datastore.DataStoreBlobStore Error occurred while fetching DataRecord for identifier markedTimestamp-f38d7f8c-1371-4080-a59c-4bf532526500 org.apache.jackrabbit.core.data.DataStoreException: Record markedTimestamp-f38d7f8c-1371-4080-a59c-4bf532526500 does not exist at org.apache.jackrabbit.core.data.AbstractDataStore.getRecord(AbstractDataStore.java:47) at org.apache.jackrabbit.oak.plugins.blob.datastore.DataStoreBlobStore$3.apply(DataStoreBlobStore.java:354) at org.apache.jackrabbit.oak.plugins.blob.datastore.DataStoreBlobStore$3.apply(DataStoreBlobStore.java:349) at com.google.common.collect.Iterators$8.transform(Iterators.java:794) at com.google.common.collect.TransformedIterator.next(TransformedIterator.java:48) at com.google.common.collect.Iterators$7.computeNext(Iterators.java:646) at com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:143) at com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:138) at com.google.common.collect.TransformedIterator.hasNext(TransformedIterator.java:43) at org.apache.jackrabbit.oak.plugins.blob.MarkSweepGarbageCollector$BlobIdRetriever.call(MarkSweepGarbageCollector.java:543) at org.apache.jackrabbit.oak.plugins.blob.MarkSweepGarbageCollector.sweep(MarkSweepGarbageCollector.java:360) at org.apache.jackrabbit.oak.plugins.blob.MarkSweepGarbageCollector.markAndSweep(MarkSweepGarbageCollector.java:241) at org.apache.jackrabbit.oak.plugins.blob.MarkSweepGarbageCollector.collectGarbage(MarkSweepGarbageCollector.java:158) at org.apache.jackrabbit.oak.plugins.blob.BlobGC$1.call(BlobGC.java:83) at org.apache.jackrabbit.oak.plugins.blob.BlobGC$1.call(BlobGC.java:79) at java.util.concurrent.FutureTask.run(FutureTask.java:262) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:745)
Environment
AEM 6.1 + Oak 1.2.20 or earlier
Cause
This error was fixed in 1.2.21 (OAK-5078). It is because the paths in the FileDataStore configuration are relative.
Resolution
There are two possible solutions:
A. Set the datastore path to an absolute path
- Login to the server where AEM is installed.
- Open the crx-quickstart/install directory.
- Open the file org.apache.jackrabbit.oak.plugins.blob.datastore.FileDataStore.cfg or org.apache.jackrabbit.oak.plugins.blob.datastore.FileDataStore.config under crx-quickstart/install
- Edit the path variable and set the path to an absolute path to the datastore instead of a relative one.
For example:
Before: path=./crx-quickstart/repository/datastore
After: path=/opt/aem/author/crx-quickstart/repository/datastore
B. Upgrade AEM or update Oak to 1.2.21 or later version
Either upgrade to AEM6.2 or later or apply the latest Oak hotfix from here:
https://helpx.adobe.com/experience-manager/kb/aem61-available-hotfixes.html
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