/**
* Perform time consuming opening of the daughter regions.
*
* @param server Hosting server instance. Can be null when testing
* @param services Used to online/offline regions.
* @param a first daughter region
* @param a second daughter region
* @throws IOException If thrown, transaction failed. Call {@link #rollback(Server,
* RegionServerServices)}
*/
@VisibleForTesting
void openDaughters(final Server server, final RegionServerServices services, Region a, Region b)
throws IOException {
boolean stopped = server != null && server.isStopped();
boolean stopping = services != null && services.isStopping();
// TODO: Is this check needed here?
if (stopped || stopping) {
LOG.info(
"Not opening daughters "
+ b.getRegionInfo().getRegionNameAsString()
+ " and "
+ a.getRegionInfo().getRegionNameAsString()
+ " because stopping="
+ stopping
+ ", stopped="
+ stopped);
} else {
// Open daughters in parallel.
DaughterOpener aOpener = new DaughterOpener(server, a);
DaughterOpener bOpener = new DaughterOpener(server, b);
aOpener.start();
bOpener.start();
try {
aOpener.join();
if (aOpener.getException() == null) {
transition(SplitTransactionPhase.OPENED_REGION_A);
}
bOpener.join();
if (bOpener.getException() == null) {
transition(SplitTransactionPhase.OPENED_REGION_B);
}
} catch (InterruptedException e) {
throw (InterruptedIOException) new InterruptedIOException().initCause(e);
}
if (aOpener.getException() != null) {
throw new IOException("Failed " + aOpener.getName(), aOpener.getException());
}
if (bOpener.getException() != null) {
throw new IOException("Failed " + bOpener.getName(), bOpener.getException());
}
if (services != null) {
if (!services.reportRegionStateTransition(
TransitionCode.SPLIT, parent.getRegionInfo(), hri_a, hri_b)) {
throw new IOException(
"Failed to report split region to master: "
+ parent.getRegionInfo().getShortNameToLog());
}
// Should add it to OnlineRegions
services.addToOnlineRegions(b);
services.addToOnlineRegions(a);
}
}
}
DaughterOpener(final Server s, final Region r) {
super(
(s == null ? "null-services" : s.getServerName())
+ "-daughterOpener="
+ r.getRegionInfo().getEncodedName());
setDaemon(true);
this.server = s;
this.r = r;
}
/**
* Open daughter regions, add them to online list and update meta.
*
* @param server
* @param daughter
* @throws IOException
* @throws KeeperException
*/
@VisibleForTesting
void openDaughterRegion(final Server server, final Region daughter)
throws IOException, KeeperException {
HRegionInfo hri = daughter.getRegionInfo();
LoggingProgressable reporter =
server == null
? null
: new LoggingProgressable(
hri,
server
.getConfiguration()
.getLong("hbase.regionserver.split.daughter.open.log.interval", 10000));
((HRegion) daughter).openHRegion(reporter);
}
