(System.currentTimeMillis() - 15000);
LOG.debug("Handling transition=" + data.getEventType() +
", server=" + data.getOrigin() + ", region=" +
(prettyPrintedRegionName == null? "null": prettyPrintedRegionName) +
(lateEvent? ", which is more than 15 seconds late" : ""));
RegionState regionState = regionsInTransition.get(encodedName);
switch (data.getEventType()) {
case M_ZK_REGION_OFFLINE:
// Nothing to do.
break;
case RS_ZK_REGION_SPLITTING:
if (!isInStateForSplitting(regionState)) break;
addSplittingToRIT(sn, encodedName);
break;
case RS_ZK_REGION_SPLIT:
// RegionState must be null, or SPLITTING or PENDING_CLOSE.
if (!isInStateForSplitting(regionState)) break;
// If null, add SPLITTING state before going to SPLIT
if (regionState == null) {
regionState = addSplittingToRIT(sn, encodedName);
String message = "Received SPLIT for region " + prettyPrintedRegionName +
" from server " + sn;
// If still null, it means we cannot find it and it was already processed
if (regionState == null) {
LOG.warn(message + " but it doesn't exist anymore," +
" probably already processed its split");
break;
}
LOG.info(message +
" but region was not first in SPLITTING state; continuing");
}
// Check it has daughters.
byte [] payload = data.getPayload();
List<HRegionInfo> daughters = null;
try {
daughters = Writables.getHRegionInfos(payload, 0, payload.length);
} catch (IOException e) {
LOG.error("Dropped split! Failed reading split payload for " +
prettyPrintedRegionName);
break;
}
assert daughters.size() == 2;
// Assert that we can get a serverinfo for this server.
if (!this.serverManager.isServerOnline(sn)) {
LOG.error("Dropped split! ServerName=" + sn + " unknown.");
break;
}
// Run handler to do the rest of the SPLIT handling.
this.executorService.submit(new SplitRegionHandler(master, this,
regionState.getRegion(), sn, daughters));
break;
case M_ZK_REGION_CLOSING:
// Should see CLOSING after we have asked it to CLOSE or additional
// times after already being in state of CLOSING
if (regionState == null ||
(!regionState.isPendingClose() && !regionState.isClosing())) {
LOG.warn("Received CLOSING for region " + prettyPrintedRegionName +
" from server " + data.getOrigin() + " but region was in " +
" the state " + regionState + " and not " +
"in expected PENDING_CLOSE or CLOSING states");
return;
}
// Transition to CLOSING (or update stamp if already CLOSING)
regionState.update(RegionState.State.CLOSING,
data.getStamp(), data.getOrigin());
break;
case RS_ZK_REGION_CLOSED:
// Should see CLOSED after CLOSING but possible after PENDING_CLOSE
if (regionState == null ||
(!regionState.isPendingClose() && !regionState.isClosing())) {
LOG.warn("Received CLOSED for region " + prettyPrintedRegionName +
" from server " + data.getOrigin() + " but region was in " +
" the state " + regionState + " and not " +
"in expected PENDING_CLOSE or CLOSING states");
return;
}
// Handle CLOSED by assigning elsewhere or stopping if a disable
// If we got here all is good. Need to update RegionState -- else
// what follows will fail because not in expected state.
regionState.update(RegionState.State.CLOSED,
data.getStamp(), data.getOrigin());
removeClosedRegion(regionState.getRegion());
this.executorService.submit(new ClosedRegionHandler(master,
this, regionState.getRegion()));
break;
case RS_ZK_REGION_FAILED_OPEN:
if (regionState == null ||
(!regionState.isPendingOpen() && !regionState.isOpening())) {
LOG.warn("Received FAILED_OPEN for region " + prettyPrintedRegionName +
" from server " + data.getOrigin() + " but region was in " +
" the state " + regionState + " and not in PENDING_OPEN or OPENING");
return;
}
// Handle this the same as if it were opened and then closed.
regionState.update(RegionState.State.CLOSED,
data.getStamp(), data.getOrigin());
this.executorService.submit(new ClosedRegionHandler(master,
this, regionState.getRegion()));
break;
case RS_ZK_REGION_OPENING:
// Should see OPENING after we have asked it to OPEN or additional
// times after already being in state of OPENING
if (regionState == null ||
(!regionState.isPendingOpen() && !regionState.isOpening())) {
LOG.warn("Received OPENING for region " +
prettyPrintedRegionName +
" from server " + data.getOrigin() + " but region was in " +
" the state " + regionState + " and not " +
"in expected PENDING_OPEN or OPENING states");
return;
}
// Transition to OPENING (or update stamp if already OPENING)
regionState.update(RegionState.State.OPENING,
data.getStamp(), data.getOrigin());
break;
case RS_ZK_REGION_OPENED:
// Should see OPENED after OPENING but possible after PENDING_OPEN
if (regionState == null ||
(!regionState.isPendingOpen() && !regionState.isOpening())) {
LOG.warn("Received OPENED for region " +
prettyPrintedRegionName +
" from server " + data.getOrigin() + " but region was in " +
" the state " + regionState + " and not " +
"in expected PENDING_OPEN or OPENING states");
return;
}
// Handle OPENED by removing from transition and deleted zk node
regionState.update(RegionState.State.OPEN,
data.getStamp(), data.getOrigin());
this.executorService.submit(
new OpenedRegionHandler(master, this, regionState.getRegion(),
data.getOrigin(), expectedVersion));
break;
}
}
}