When CoordinatorEnvironmentBean.defaultTimeout approaches Integer.MAX_VALUE, the calculation in ReaperElement.<ctor> wraps, resulting in an immediate tx timeout

_absoluteTimeoutMills = (timeout * 1000) + System.currentTimeMillis();

should be

_absoluteTimeoutMills = (timeout * 1000L) + System.currentTimeMillis();

in order to avoid -ve i.e. times in the past when timeout is large.