Generational parser does not seem to handle GC Cause included in young event.

[Bluetopia]

Describe the bug
When processing a line like:
5.374: [GC (Allocation Failure) [PSYoungGen: 262144K->28340K(305664K)] 262144K->28364K(1005056K), 0.0146665 secs] [Times: user=0.08 sys=0.00, real=0.01 secs]
GenerationalHeapParser.psYoungGen(GCLogTrace, String) is called and the offset (5) appears to not take into account the cause, resulting in:

May 01, 2024 10:03:19 AM com.microsoft.gctoolkit.parser.GCLogTrace getOccupancyBeforeAfterWithMemoryPoolSizeSummary
WARNING: Unable to calculate generational memory pool summary.
vert.x-eventloop-thread-0, not implemented: 5.374: [GC (Allocation Failure) [PSYoungGen: 262144K->28340K(305664K)] 262144K->28364K(1005056K), 0.0146665 secs]2024-05-01 10:03:19,806 [vert.x-eventloop-thread-0] INFO STDOUT: vert.x-eventloop-thread-0, not implemented: 5.374: [GC (Allocation Failure) [PSYoungGen: 262144K->28340K(305664K)] 262144K->28364K(1005056K), 0.0146665 secs]

with the following groups:

1: 5.374
2: null
3: null
4: 5.374
5: null
6: (Allocation Failure)
7: PSYoungGen
8: 262144
9: K
10: 28340
11: K
12: 305664
13: K
14: 262144
15: K
16: 28364
17: K
18: 1005056
19: K
20: 0.0146665

getOccupancyBeforeAfterWithMemoryPoolSizeSummary tries to convert null (5), "PSYoungGen" (7), and "K" to KByte values, which generates a NumberFormatException, and causing the notYetImplemented() logging.

To Reproduce
Steps to reproduce the behavior:

• Attempt to load the attached file
  sample.zip

Expected behavior
GCToolkit is able to properly parse the GC event.

Desktop (please complete the following information):

• OS: Windows 11
• Java 11 (Amazon Corretto)
• GCToolkit tip (April 30, 2024)

Additional context
This is an older log file from Java 8/CMS that likely won't come up as frequently anymore, so it may be a lower priority. It's not clear if this should be a feature request instead due to the fact this triggers "Not yet implemented" logging.

[Bluetopia]

Similar issues with another file, slightly different in format.

218982.552: [GC [PSYoungGen: 463514K->98518K(531328K)] 2167820K->1805185K(2239360K), 0.0933556 secs]

parallel_simple_nostamps.zip

Sample file attached.