Failing to parse log on some ERRORs

[anonymosh]

Describe the bug
The script fails with the following description on the console:

ERROR - Failed to handle correlatorLog.log line 161199: 2020-10-14 16:17:36,895 WARN  [kafka-producer-network-thread | octo-event-producer-4ccf0ce4-e748-48c6-a06b-ea808c026ffc] - : [Producer clientId=octo-event-producer-4ccf0ce4-e748-48c6-a06b-ea808c026ffc] Got error produce response with correlation id 19909 on topic-partition message.event.crash-score-21, retrying (9 attempts left). Error: NETWORK_EXCEPTION -
Traceback (most recent call last):
  File "log_analyzer.py", line 539, in processFile
    if self.handleLine(file=file, line=logline, previousLine=previousLine) != LogAnalyzer.DONT_UPDATE_PREVIOUS_LINE:
  File "log_analyzer.py", line 628, in handleLine
    self.handleWarnOrError(file=file, isError=False, line=line)
  File "log_analyzer.py", line 1073, in handleWarnOrError
    if tracker['first'].getDateTime() > line.getDateTime():
TypeError: '>' not supported between instances of 'NoneType' and 'NoneType'
Traceback (most recent call last):
  File "log_analyzer.py", line 2391, in <module>
    sys.exit(LogAnalyzerTool().main(sys.argv[1:]))
  File "log_analyzer.py", line 2335, in main
    manager.processFiles(sorted(list(logpaths)))
  File "log_analyzer.py", line 473, in processFiles
    self.processFile(file=file)
  File "log_analyzer.py", line 539, in processFile
    if self.handleLine(file=file, line=logline, previousLine=previousLine) != LogAnalyzer.DONT_UPDATE_PREVIOUS_LINE:
  File "log_analyzer.py", line 628, in handleLine
    self.handleWarnOrError(file=file, isError=False, line=line)
  File "log_analyzer.py", line 1073, in handleWarnOrError
    if tracker['first'].getDateTime() > line.getDateTime():
TypeError: '>' not supported between instances of 'NoneType' and 'NoneType'

Expected behavior
Log parses correctly

Affected version(s)

• Log analyzer version: 3.7/2020-06-09
• Apama version(s): 10.5.3 Community
• Python version(s): 3.7.4 (Apama Built-In)
• Operating System(s): Windows 10