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HBASE-1421 Processing a regionserver message -- OPEN, CLOSE, SPLIT, etc. -- and if we're carrying more than one message in payload, if exception, all messages that follow are dropped on floor 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/hbase/trunk@776050 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Michael Stack 2009-05-18 18:42:13 +00:00
parent b4dedf9cbf
commit c40632b210
5 changed files with 52 additions and 42 deletions
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3
CHANGES.txt
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@ -133,6 +133,9 @@ Release 0.20.0 - Unreleased
(Clint Morgan via Stack)
HBASE-1431 NPE in HTable.checkAndSave when row doesn't exist (Guilherme
Mauro Germoglio Barbosa via Andrew Purtell)
HBASE-1421 Processing a regionserver message -- OPEN, CLOSE, SPLIT, etc. --
and if we're carrying more than one message in payload, if
exception, all messages that follow are dropped on floor
IMPROVEMENTS
HBASE-1089 Add count of regions on filesystem to master UI; add percentage

4
src/java/org/apache/hadoop/hbase/master/ProcessRegionOpen.java
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@ -40,11 +40,9 @@ class ProcessRegionOpen extends ProcessRegionStatusChange {
* @param master
* @param info
* @param regionInfo
* @throws IOException
*/
public ProcessRegionOpen(HMaster master, HServerInfo info,
HRegionInfo regionInfo)
throws IOException {
HRegionInfo regionInfo) {
super(master, regionInfo);
if (info == null) {
throw new NullPointerException("HServerInfo cannot be null; " +

15
src/java/org/apache/hadoop/hbase/master/RegionManager.java
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@ -1230,9 +1230,8 @@ class RegionManager implements HConstants {
*/
synchronized void setPendingOpen(final String serverName) {
if (!this.unassigned) {
throw new IllegalStateException(
"Cannot assign a region that is not currently unassigned. State: " +
toString());
LOG.warn("Cannot assign a region that is not currently unassigned. " +
"FIX!! State: " + toString());
}
this.unassigned = false;
this.pendingOpen = true;
@ -1250,9 +1249,8 @@ class RegionManager implements HConstants {
synchronized void setOpen() {
if (!pendingOpen) {
throw new IllegalStateException(
"Cannot set a region as open if it has not been pending. State: " +
toString());
LOG.warn("Cannot set a region as open if it has not been pending. " +
"FIX!! State: " + toString());
}
this.unassigned = false;
this.pendingOpen = false;
@ -1284,9 +1282,8 @@ class RegionManager implements HConstants {
synchronized void setPendingClose() {
if (!closing) {
throw new IllegalStateException(
"Cannot set a region as pending close if it has not been closing. " +
"State: " + toString());
LOG.warn("Cannot set a region as pending close if it has not been " +
"closing. FIX!! State: " + toString());
}
this.unassigned = false;
this.pendingOpen = false;

64
src/java/org/apache/hadoop/hbase/master/ServerManager.java
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@ -388,26 +388,30 @@ class ServerManager implements HConstants {
return processMsgs(serverInfo, mostLoadedRegions, msgs);
}
/**
/*
* Process all the incoming messages from a server that's contacted us.
*
* Note that we never need to update the server's load information because
* that has already been done in regionServerReport.
* @param serverInfo
* @param mostLoadedRegions
* @param incomingMsgs
* @return
*/
private HMsg[] processMsgs(HServerInfo serverInfo,
HRegionInfo[] mostLoadedRegions, HMsg incomingMsgs[])
throws IOException {
HRegionInfo[] mostLoadedRegions, HMsg incomingMsgs[]) {
ArrayList<HMsg> returnMsgs = new ArrayList<HMsg>();
if (serverInfo.getServerAddress() == null) {
throw new NullPointerException("Server address cannot be null; " +
"hbase-958 debugging");
}
// Get reports on what the RegionServer did.
// Be careful that in message processors we don't throw exceptions that
// break the switch below because then we might drop messages on the floor.
int openingCount = 0;
for (int i = 0; i < incomingMsgs.length; i++) {
HRegionInfo region = incomingMsgs[i].getRegionInfo();
LOG.info("Received " + incomingMsgs[i] + " from " +
serverInfo.getServerName());
serverInfo.getServerName() + "; " + i + " of " + incomingMsgs.length);
switch (incomingMsgs[i].getType()) {
case MSG_REPORT_PROCESS_OPEN:
openingCount++;
@ -422,13 +426,11 @@ class ServerManager implements HConstants {
break;
case MSG_REPORT_SPLIT:
processSplitRegion(region, incomingMsgs[++i], incomingMsgs[++i],
returnMsgs);
processSplitRegion(region, incomingMsgs[++i], incomingMsgs[++i]);
break;
default:
throw new IOException(
"Impossible state during message processing. Instruction: " +
LOG.warn("Impossible state during message processing. Instruction: " +
incomingMsgs[i].getType());
}
}
@ -456,7 +458,7 @@ class ServerManager implements HConstants {
return returnMsgs.toArray(new HMsg[returnMsgs.size()]);
}
/**
/*
* A region has split.
*
* @param region
@ -464,21 +466,16 @@ class ServerManager implements HConstants {
* @param splitB
* @param returnMsgs
*/
private void processSplitRegion(HRegionInfo region, HMsg splitA, HMsg splitB,
ArrayList<HMsg> returnMsgs) {
private void processSplitRegion(HRegionInfo region, HMsg splitA, HMsg splitB) {
synchronized (master.regionManager) {
// Cancel any actions pending for the affected region.
// This prevents the master from sending a SPLIT message if the table
// has already split by the region server.
master.regionManager.endActions(region.getRegionName());
HRegionInfo newRegionA = splitA.getRegionInfo();
master.regionManager.setUnassigned(newRegionA, false);
HRegionInfo newRegionB = splitB.getRegionInfo();
master.regionManager.setUnassigned(newRegionB, false);
if (region.isMetaTable()) {
// A meta region has split.
master.regionManager.offlineMetaRegion(region.getStartKey());
@ -487,10 +484,14 @@ class ServerManager implements HConstants {
}
}
/** Region server is reporting that a region is now opened */
/*
* Region server is reporting that a region is now opened
* @param serverInfo
* @param region
* @param returnMsgs
*/
private void processRegionOpen(HServerInfo serverInfo,
HRegionInfo region, ArrayList<HMsg> returnMsgs)
throws IOException {
HRegionInfo region, ArrayList<HMsg> returnMsgs) {
boolean duplicateAssignment = false;
synchronized (master.regionManager) {
if (!master.regionManager.isUnassigned(region) &&
@ -549,19 +550,30 @@ class ServerManager implements HConstants {
// Note that the table has been assigned and is waiting for the
// meta table to be updated.
master.regionManager.setOpen(region.getRegionNameAsString());
// Queue up an update to note the region location.
try {
master.toDoQueue.put(
new ProcessRegionOpen(master, serverInfo, region));
} catch (InterruptedException e) {
throw new RuntimeException(
"Putting into toDoQueue was interrupted.", e);
// Queue up an update to note the region location. Do inside
// a retry loop in case interrupted.
boolean succeeded = false;
for (int i = 0; i < 10; i++) {
try {
master.toDoQueue.
put(new ProcessRegionOpen(master, serverInfo, region));
succeeded = true;
} catch (InterruptedException e) {
LOG.warn("Putting into toDoQueue was interrupted.", e);
}
}
if (!succeeded) {
LOG.warn("FAILED ADDING OPEN TO TODO QUEUE: " + serverInfo);
}
}
}
}
}
/*
* @param region
* @throws Exception
*/
private void processRegionClose(HRegionInfo region) {
synchronized (master.regionManager) {
if (region.isRootRegion()) {