xyuanlu opened a new issue #1453:
URL: https://github.com/apache/helix/issues/1453
### Describe the bug
During our Helix controller log analysis, we found that the number of
periodic rebalance event trigged for a particular clusters increase every hour
with no config change. This implies the periodic rebalance's Timer leakage
issue.
This is the log analysis result we have. The cluster has periodic rebalance
rate set to 2400 millisecond.
```
| cluster_name | Time_interval start (duration = 1h) | # of periodic
rebalance event scheduled|
| CLUSTER_X | 2020-10-02 18:00:00 | 15
|
| CLUSTER_X | 2020-10-02 19:00:00 | 15
|
| CLUSTER_X | 2020-10-02 20:00:00 | 22
|
| CLUSTER_X | 2020-10-02 21:00:00 | 75
|
| CLUSTER_X | 2020-10-02 22:00:00 | 97
|
```
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