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HBASE-5875 Process RIT and Master restart may remove an online server considering it as a dead server (Rajesh) 

Submitted by:Rajesh	
Reviewed by:Ram Ted, Stack	


git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1353688 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
ramkrishna 2012-06-25 18:07:32 +00:00
parent d0ec4af44a
commit f690e086f6
1 changed files with 24 additions and 8 deletions
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32
hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java
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@ -748,7 +748,8 @@ Server {
boolean rit = this.assignmentManager.
processRegionInTransitionAndBlockUntilAssigned(HRegionInfo.ROOT_REGIONINFO);
ServerName currentRootServer = null;
if (!catalogTracker.verifyRootRegionLocation(timeout)) {
boolean rootRegionLocation = catalogTracker.verifyRootRegionLocation(timeout);
if (!rit && !rootRegionLocation) {
currentRootServer = this.catalogTracker.getRootLocation();
splitLogAndExpireIfOnline(currentRootServer);
this.assignmentManager.assignRoot();
@ -757,7 +758,13 @@ Server {
// This guarantees that the transition assigning -ROOT- has completed
this.assignmentManager.waitForAssignment(HRegionInfo.ROOT_REGIONINFO);
assigned++;
} else {
} else if (rit && !rootRegionLocation) {
// Make sure a -ROOT- location is set.
if (!isRootLocation()) return false;
// This guarantees that the transition assigning -ROOT- has completed
this.assignmentManager.waitForAssignment(HRegionInfo.ROOT_REGIONINFO);
assigned++;
} else if (rootRegionLocation) {
// Region already assigned. We didn't assign it. Add to in-memory state.
this.assignmentManager.regionOnline(HRegionInfo.ROOT_REGIONINFO,
this.catalogTracker.getRootLocation());
@ -774,7 +781,8 @@ Server {
status.setStatus("Assigning META region");
rit = this.assignmentManager.
processRegionInTransitionAndBlockUntilAssigned(HRegionInfo.FIRST_META_REGIONINFO);
if (!this.catalogTracker.verifyMetaRegionLocation(timeout)) {
boolean metaRegionLocation = this.catalogTracker.verifyMetaRegionLocation(timeout);
if (!rit && !metaRegionLocation) {
ServerName currentMetaServer =
this.catalogTracker.getMetaLocationOrReadLocationFromRoot();
if (currentMetaServer != null
@ -782,11 +790,11 @@ Server {
splitLogAndExpireIfOnline(currentMetaServer);
}
assignmentManager.assignMeta();
enableServerShutdownHandler();
this.catalogTracker.waitForMeta();
// Above check waits for general meta availability but this does not
// guarantee that the transition has completed
this.assignmentManager.waitForAssignment(HRegionInfo.FIRST_META_REGIONINFO);
enableSSHandWaitForMeta();
assigned++;
} else if (rit && !metaRegionLocation) {
// Wait until META region added to region server onlineRegions. See HBASE-5875.
enableSSHandWaitForMeta();
assigned++;
} else {
// Region already assigned. We didnt' assign it. Add to in-memory state.
@ -800,6 +808,14 @@ Server {
return true;
}
private void enableSSHandWaitForMeta() throws IOException, InterruptedException {
enableServerShutdownHandler();
this.catalogTracker.waitForMeta();
// Above check waits for general meta availability but this does not
// guarantee that the transition has completed
this.assignmentManager.waitForAssignment(HRegionInfo.FIRST_META_REGIONINFO);
}
/**
* @return True if there a root available
* @throws InterruptedException