An error similar to the one below is observed in the AEM logs during installation of the 6.3 war to an app server. The installation fails due to this error.
12.06.2017 12:30:08.145 *ERROR* [FelixStartLevel] org.apache.jackrabbit.oak.plugins.blob.datastore.OakFileDataStore Exception while adding metadata record with name repository-2ae15989-23ed-47aa-b20e-2bd1ec04b0ea, {} java.io.FileNotFoundException: crx-quickstart/repository/datastore/repository-2ae15989-23ed-47aa-b20e-2bd1ec04b0ea (No such file or directory) at java.io.FileOutputStream.open0(Native Method) at java.io.FileOutputStream.open(FileOutputStream.java:270) at java.io.FileOutputStream.<init>(FileOutputStream.java:213) at java.io.FileOutputStream.<init>(FileOutputStream.java:162)
There is an issue in Apache Oak that causes the errors when a relative path is set for the FileDataStore: OAK-5078
crx-quickstart/install/crx3mpxtar/org.apache.jackrabbit.oak.plugins.blob.datastore.FileDataStore.config crx-quickstart/install/crx3mpxtar/org.apache.jackrabbit.oak.plugins.blob.datastore.FileDataStore.config
path="/absolute/path/to/datastore"