[ZEPPELIN-1114] Python: improve paragraph ERROR status detection

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.7.0
• Fix Version/s: 0.7.1, 0.8.0
• Component/s: python-interpreter
• Assignee: Shim HyungSung
• Reporter: Alexander Bezzubov
• Created: 05/Jul/16 07:06
• Updated: 18/Mar/17 16:29
• Resolved: 18/Mar/17 16:29

Description

As discussed in initial implementation of this feature current error detection implementation under ZEPPELIN-1105 is sub-optimal

Accuracy
Right now a code like:

print("there is no Error: ok")

will trigger a false positive paragraph ERROR status.

II. Speed
It is also slow, in case of the long strings in output, as noted in ZEPPELIN-1360.

There are at least two possible approaches to improve here:

• put user code under try ... except
• or re-direct sys.stderr and check for non-empty value

Issue Links

• incorporates: ZEPPELIN-1360 Printing long strings is very slow in the python interpreter
• Is contained by: ZEPPELIN-1325 Better Python interpreter impl