i got java.lang.arrayindexoutboundsexception null when use ibm jdk

[thineagle]

I've got java.lang.ArrayIndexOutOfBoundsException: null exception in my application two times in different code, both of them happened at list.get() method.
CopyOnWriteArrayList.java:399
ArrayList.java:474
i am sure my array index is right.

the jdk version is
java version "1.8.0_211" Java(TM) SE Runtime Environment (build 8.0.5.36 - pxz6480sr5fp36-20190510_01(SR5 FP36)) IBM J9 VM (build 2.9, JRE 1.8.0 Linux s390x-64-Bit Compressed References 20190502_415899 (JIT enabled, AOT enabled) OpenJ9   - 46e57f9 OMR      - 06a046a IBM      - 0b909bf) JCL - 20190409_01 based on Oracle jdk8u211-b25

when i use sun jdk it have no problem.

[gaoyn-cn]

hi, i got the exactly same issue as yours. i have some doubt on jdk, but no response from ibm.
do you have got any fix ?