[NIFI-3671] GenerateFlowFile throws NPE in FileSystemRepository

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.2.0
• Fix Version/s: 1.3.0
• Component/s: Core Framework
• Environment: Ubuntu Linux 14.04.5 LTS, x86, NiFi 1.2.0-SNAPSHOT, Java 1.8.0_102
• Assignee: Mark Payne
• Reporter: Joe Skora
• Created: 04/Apr/17 21:34
• Updated: 24/May/17 18:22
• Resolved: 24/May/17 18:22

Description

While volume testing, GenerateFlowFile is randomly throwing NullPointerException during startup. The NPE occurs in FileSystemRepository.write() called from BufferedOutputStream.flushBuffer() and results in an Administrative Yield.

When it happens, the bulletin shows up on the processors immediately after starting them. Starting them a second time will often succeed, but sometimes it takes a multiple retries. When the GenerateFlowFile processors are started for these tests, the graph is typically empty.

Log entries for an example Thread are attached. This looks similar to NIFI-2551, but that is marked as being fixed in 1.0.0.

Issue Links

• links to: GitHub Pull Request #1852