KYLIN-4262 Fix pid in GC filename inconsistent with real pid

[Wayne1c]

No description provided.

[asf-ci]

Can one of the admins verify this patch?

[codecov-io]

Codecov Report

Merging #949 into master will decrease coverage by 0.01%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master     #949      +/-   ##
============================================
- Coverage     25.58%   25.56%   -0.02%     
+ Complexity     6140     6138       -2     
============================================
  Files          1412     1412              
  Lines         85072    85072              
  Branches      11928    11928              
============================================
- Hits          21762    21752      -10     
- Misses        61205    61211       +6     
- Partials       2105     2109       +4

Impacted Files	Coverage Δ	Complexity Δ
...he/kylin/dict/lookup/cache/RocksDBLookupTable.java	72.97% <0%> (-5.41%)	6% <0%> (-1%)
...org/apache/kylin/rest/util/QueryRequestLimits.java	35.71% <0%> (-4.77%)	5% <0%> (-1%)
.../apache/kylin/cube/cuboid/TreeCuboidScheduler.java	63.84% <0%> (-2.31%)	0% <0%> (ø)
...rg/apache/kylin/cube/inmemcubing/MemDiskStore.java	69.3% <0%> (-0.92%)	7% <0%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 6b853ce...28a4aaf. Read the comment docs.

[coveralls]

Pull Request Test Coverage Report for Build 5243

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 8 unchanged lines in 3 files lost coverage.
• Overall coverage decreased (-0.006%) to 28.052%

---

Files with Coverage Reduction	New Missed Lines	%
core-dictionary/src/main/java/org/apache/kylin/dict/lookup/cache/RocksDBLookupTable.java	1	81.08%
core-cube/src/main/java/org/apache/kylin/cube/cuboid/TreeCuboidScheduler.java	2	68.46%
core-cube/src/main/java/org/apache/kylin/cube/inmemcubing/MemDiskStore.java	5	77.81%

Totals
Change from base Build 5229:	-0.006%
Covered Lines:	23864
Relevant Lines:	85072

---

💛 - Coveralls

[Wayne1c]

retest this please

[nichunen]

Approved