Is this a question, feature request, bug report, or bookkeeper proposal?
**QUESTION**
**BUG REPORT**
1. Please describe the issue you observed:
If configured, every read request schedules a Future task
to send speculative reads on speculativeReadTimeout.
When the read is completed successfully, this task must be
canceled otherwise it leads to memory consumption and under
heavy load the tasks get accumulated which forces lengthy
GC cycles. These lengthy GC cycles may cause ZK lease expiry
and all other sorts of problems eventually resulting in application
errors.
[ Full content available at: https://github.com/apache/bookkeeper/issues/1664 ]
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