Is this name to long to be a database name 72d264ce-e739-48f0-8c06-98cf081e5e32-1460911677562, it seems to match the requirements laid down in the docs.
Caution:For compatibility reasons, database names cannot contain uppercase letters! The only legal characters are lowercase ASCII letters, digits, and the special characters _$()±/
Kind regards,
Jacko
https://mothereff.in/byte-counter says its 50 bytes so you are good 
You can store a key size of 250 bytes max.
Sorry, I should have said I get this error in Android Studio 2.0 when I try to initially load the app onto one of my test devices (Google Nexus tablet Android 5.1.1), so this fails when I first try to create the database, on allowing the App to crash I run the app again and it is fine, it can open the database with the naming convention as provided before:
Invalid database name: 72d264ce-e739-48f0-8c06-98cf081e5e32-1460911677562
…
Caused by: java.lang.IllegalArgumentException: Invalid database name: 72d264ce-e739-48f0-8c06-98cf081e5e32-1460911677562
at com.couchbase.lite.Manager.getDatabase(Manager.java:557)
at com.couchbase.lite.Manager.openDatabase(Manager.java:333)
I used the following code taken from the ForestDB Blog post
manager = new Manager(new AndroidContext(getApplicationContext()), Manager.DEFAULT_OPTIONS);
DatabaseOptions options = new DatabaseOptions();
options.setCreate(true);
options.setStorageType(Manager.FORESTDB_STORAGE);
Database database = manager.openDatabase(dbName, options);
Where dbName is a combination of UUID.randomUUID().toString and current time in milliseconds converted to string also.
String newUUID = UUID.randomUUID().toString();
Calendar calendar = GregorianCalendar.getInstance();
long currentTime = calendar.getTimeInMillis();
dbName = String.format(Locale.UK, "%s-%d", newUUID, currentTime).toLowerCase();
Changed the code slightly too
manager = new Manager(new AndroidContext(getApplicationContext()), Manager.DEFAULT_OPTIONS);
manager.setStorageType(Manager.FORESTDB_STORAGE);
Database database = manager.getDatabase(dbName);
Now it wont run at all!
Jacko
There is one more requirement that is not clear from the documentation: the database name must start with a lower case letter (yours starts with a number). This is taken from the CouchDB requirements. It should be in our docs as well.
Hi @borrrden,
Spot on, I forced lowercase letters at the start like
dbName = String.format(Locale.UK, "%s_%s_%d", "cbl", newUUID, currentTime).toLowerCase();
And it loaded and created the database first time, as expected. It did work sometimes yesterday but the UUID part must have started with a letter, which I missed.
With thanks,
Jacko
@interneers For what it’s worth, I ran into this problem myself in one of my unit tests a month or two ago and it took me a bit to figure out (and I should know better since I am writing the .NET version ><). I thought it was odd that it was failing intermittently, then I realized it was the luck of the draw whether or not a UUID starts with a number or a letter.
My comment above about 250 byte key that is a Couchbase Server requirement not CBL database names, sorry.
SIDE NOTE
You want to key your doc ID size to equal something less then then 250 … maybe 200 bytes b/c in Couchbase server when updating a doc it keeps around the of the older version as a new key with a TTL of 5min. The key looks Something like below.
_sync:: {your-doc-id}::{ABCD-rev-number MD5 hash of Doc}
Understood, just learning about sync gateway now.
Maybe an inclusion in the documents including the above requirements would help others in the future.
With thanks,
Jacko