Maximum pool size of `ScheduledThreadPoolExecutor` cannot be changedJAVA-W0012
It is not possible to change the max pool size of a ScheduledThreadPoolExecutor using the setter functions inherited from ThreadPoolExecutor.
`synchronized` block is emptyJAVA-W0151
The code contains an empty synchronized block. This could confuse readers of this code later.
`Thread` passed where `Runnable` expectedJAVA-E0056
A Thread object is passed as a parameter to a method where a Runnable is expected. This is rather unusual, and may indicate a logic error or cause unexpected behavior.
Empty catch clauses may hide exceptionsJAVA-E0052
When a catch clause is empty, it essentially ignores any occurrences of the particular exception it handles. This could allow critical bugs to go undiagnosed because any relevant exceptions indicative of a bug would be discarded within this catch block.
Shift amounts outside the valid range may produce unexpected resultsJAVA-E0399
The code performs a shift of an int or long by a constant amount outside the acceptable range. This could potentially cause overflow or other similar errors and is at best very confusing.