private ReplicateWALEntryResponse replayToServer(List<Entry> entries, int timeout)
throws IOException {
// check whether we should still replay this entry. If the regions are changed, or the
// entry is not coming form the primary region, filter it out because we do not need it.
// Regions can change because of (1) region split (2) region merge (3) table recreated
boolean skip = false;
if (!Bytes.equals(
location.getRegionInfo().getEncodedNameAsBytes(), initialEncodedRegionName)) {
skip = true;
}
if (!entries.isEmpty() && !skip) {
Entry[] entriesArray = new Entry[entries.size()];
entriesArray = entries.toArray(entriesArray);
// set the region name for the target region replica
Pair<AdminProtos.ReplicateWALEntryRequest, CellScanner> p =
ReplicationProtbufUtil.buildReplicateWALEntryRequest(
entriesArray, location.getRegionInfo().getEncodedNameAsBytes(), null, null, null);
try {
PayloadCarryingRpcController controller =
rpcControllerFactory.newController(p.getSecond());
controller.setCallTimeout(timeout);
controller.setPriority(tableName);
return stub.replay(controller, p.getFirst());
} catch (ServiceException se) {
throw ProtobufUtil.getRemoteException(se);
}
}
if (skip) {
if (LOG.isTraceEnabled()) {
LOG.trace(
"Skipping "
+ entries.size()
+ " entries in table "
+ tableName
+ " because located region "
+ location.getRegionInfo().getEncodedName()
+ " is different than the original region "
+ Bytes.toStringBinary(initialEncodedRegionName)
+ " from WALEdit");
for (Entry entry : entries) {
LOG.trace("Skipping : " + entry);
}
}
skippedEntries.addAndGet(entries.size());
}
return ReplicateWALEntryResponse.newBuilder().build();
}
public ReplicaRegionServerCallable(int id, HRegionLocation location) {
super(
RpcRetryingCallerWithReadReplicas.this.cConnection,
RpcRetryingCallerWithReadReplicas.this.tableName,
get.getRow());
this.id = id;
this.location = location;
this.controller = rpcControllerFactory.newController();
controller.setPriority(tableName);
}
@Override
public Result call(int callTimeout) throws Exception {
if (controller.isCanceled()) return null;
if (Thread.interrupted()) {
throw new InterruptedIOException();
}
byte[] reg = location.getRegionInfo().getRegionName();
ClientProtos.GetRequest request = RequestConverter.buildGetRequest(reg, get);
controller.setCallTimeout(callTimeout);
try {
ClientProtos.GetResponse response = getStub().get(controller, request);
if (response == null) {
return null;
}
return ProtobufUtil.toResult(response.getResult());
} catch (ServiceException se) {
throw ProtobufUtil.getRemoteException(se);
}
}
/**
* Two responsibilities - if the call is already completed (by another replica) stops the
* retries. - set the location to the right region, depending on the replica.
*/
@Override
public void prepare(final boolean reload) throws IOException {
if (controller.isCanceled()) return;
if (Thread.interrupted()) {
throw new InterruptedIOException();
}
if (reload || location == null) {
RegionLocations rl = getRegionLocations(false, id, cConnection, tableName, get.getRow());
location = id < rl.size() ? rl.getRegionLocation(id) : null;
}
if (location == null || location.getServerName() == null) {
// With this exception, there will be a retry. The location can be null for a replica
// when the table is created or after a split.
throw new HBaseIOException("There is no location for replica id #" + id);
}
ServerName dest = location.getServerName();
setStub(cConnection.getClient(dest));
}
@Override
public boolean isCancelled() {
return controller.isCanceled();
}
@Override
public void cancel() {
controller.startCancel();
}