/**
* Wait on region to clear regions-in-transition.
*
* <p>If the region isn't in transition, returns immediately. Otherwise, method blocks until the
* region is out of transition.
*/
public synchronized void waitOnRegionToClearRegionsInTransition(final HRegionInfo hri)
throws InterruptedException {
if (!isRegionInTransition(hri)) return;
while (!server.isStopped() && isRegionInTransition(hri)) {
RegionState rs = getRegionState(hri);
LOG.info("Waiting on " + rs + " to clear regions-in-transition");
waitForUpdate(100);
}
if (server.isStopped()) {
LOG.info("Giving up wait on region in " + "transition because stoppable.isStopped is set");
}
}
/**
* Unassign the list of regions. Configuration knobs: hbase.bulk.waitbetween.reopen indicates the
* number of milliseconds to wait before unassigning another region from this region server
*
* @param regions
* @throws InterruptedException
*/
private void unassign(List<HRegionInfo> regions) throws InterruptedException {
int waitTime = this.server.getConfiguration().getInt("hbase.bulk.waitbetween.reopen", 0);
RegionStates regionStates = assignmentManager.getRegionStates();
for (HRegionInfo region : regions) {
if (server.isStopped()) {
return;
}
if (regionStates.isRegionInTransition(region)) {
continue;
}
assignmentManager.unassign(region);
while (regionStates.isRegionInTransition(region) && !server.isStopped()) {
regionStates.waitForUpdate(100);
}
if (waitTime > 0 && !server.isStopped()) {
Thread.sleep(waitTime);
}
}
}