got-root opened a new pull request, #568: URL: https://github.com/apache/pulsar-helm-chart/pull/568
### Motivation
Getting OOM issues on broker startup in the wait-zookeeper-ready
initContainer:
```
pulsar cluster stellar-pulsar isn't initialized yet ... check in 3 seconds
...
[1.007s][error][gc] Failed to commit memory (Not enough space)
[1.694s][error][gc] Failed to commit memory (Not enough space)
[2.282s][error][gc] Failed to commit memory (Not enough space)
[2.785s][error][gc] Failed to commit memory (Not enough space)
[3.086s][error][gc] Failed to commit memory (Not enough space)
[3.086s][error][gc] Forced to lower max Java heap size from 2048M(100%) to
1508M(74%)
[3.086s][error][gc] Failed to allocate initial Java heap (2048M)
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.
pulsar cluster stellar-pulsar isn't initialized yet ... check in 3 seconds
...
[1.114s][error][gc] Failed to commit memory (Not enough space)
[1.738s][error][gc] Failed to commit memory (Not enough space)
[2.111s][error][gc] Failed to commit memory (Not enough space)
[2.421s][error][gc] Failed to commit memory (Not enough space)
[2.762s][error][gc] Failed to commit memory (Not enough space)
[2.762s][error][gc] Forced to lower max Java heap size from 2048M(100%) to
1508M(74%)
[2.762s][error][gc] Failed to allocate initial Java heap (2048M)
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.
pulsar cluster stellar-pulsar isn't initialized yet ... check in 3 seconds
...
[1.082s][error][gc] Failed to commit memory (Not enough space)
[1.707s][error][gc] Failed to commit memory (Not enough space)
[2.067s][error][gc] Failed to commit memory (Not enough space)
[2.354s][error][gc] Failed to commit memory (Not enough space)
[2.644s][error][gc] Failed to commit memory (Not enough space)
[2.644s][error][gc] Forced to lower max Java heap size from 2048M(100%) to
1508M(74%)
[2.644s][error][gc] Failed to allocate initial Java heap (2048M)
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.
Killed
```
### Modifications
Looks like the check to see if zookeeper is running mistakenly has set the
`BOOKIE_MEM` env var when it should be setting `PULSAR_MEM` instead.
### Verifying this change
- [ ] Make sure that the change passes the CI checks.
- [ ] Tested on live env
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