HBASE-8627 HBCK can not fix meta not assigned issue
git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1511081 13f79535-47bb-0310-9956-ffa450edef68
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@ -390,17 +390,30 @@ public class HBaseFsck extends Configured implements Tool {
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InterruptedException {
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clearState();
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// get regions according to what is online on each RegionServer
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loadDeployedRegions();
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// check whether .META. is deployed and online
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if (!recordMetaRegion()) {
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// Will remove later if we can fix it
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errors.reportError("Fatal error: unable to get .META. region location. Exiting...");
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return -2;
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}
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// Check if .META. is found only once and in the right place
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if (!checkMetaRegion()) {
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String errorMsg = ".META. table is not consistent. ";
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if (shouldFixAssignments()) {
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errorMsg += "HBCK will try fixing it. Rerun once .META. is back to consistent state.";
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} else {
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errorMsg += "Run HBCK with proper fix options to fix .META. inconsistency.";
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}
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errors.reportError(errorMsg + " Exiting...");
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return -2;
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}
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// Not going with further consistency check for tables when META itself is not consistent.
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LOG.info("Loading regionsinfo from the .META. table");
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boolean success = loadMetaEntries();
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if (!success) return -1;
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// Check if .META. is found only once and in the right place
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if (!checkMetaRegion()) {
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// Will remove later if we can fix it
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errors.reportError("Encountered fatal error. Exiting...");
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return -2;
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}
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// Empty cells in .META.?
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reportEmptyMetaCells();
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@ -414,9 +427,6 @@ public class HBaseFsck extends Configured implements Tool {
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reportTablesInFlux();
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}
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// get regions according to what is online on each RegionServer
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loadDeployedRegions();
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// load regiondirs and regioninfos from HDFS
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if (shouldCheckHdfs()) {
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loadHdfsRegionDirs();
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@ -1334,10 +1344,13 @@ public class HBaseFsck extends Configured implements Tool {
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} catch (KeeperException e) {
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throw new IOException(e);
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}
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MetaEntry m =
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new MetaEntry(metaLocation.getRegionInfo(), sn, System.currentTimeMillis());
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HbckInfo hbInfo = new HbckInfo(m);
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regionInfoMap.put(metaLocation.getRegionInfo().getEncodedName(), hbInfo);
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MetaEntry m = new MetaEntry(metaLocation.getRegionInfo(), sn, System.currentTimeMillis());
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HbckInfo hbckInfo = regionInfoMap.get(metaLocation.getRegionInfo().getEncodedName());
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if (hbckInfo == null) {
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regionInfoMap.put(metaLocation.getRegionInfo().getEncodedName(), new HbckInfo(m));
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} else {
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hbckInfo.metaEntry = m;
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}
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return true;
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}
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@ -2492,45 +2505,36 @@ public class HBaseFsck extends Configured implements Tool {
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* @throws KeeperException
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* @throws InterruptedException
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*/
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boolean checkMetaRegion()
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throws IOException, KeeperException, InterruptedException {
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List <HbckInfo> metaRegions = Lists.newArrayList();
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boolean checkMetaRegion() throws IOException, KeeperException, InterruptedException {
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List<HbckInfo> metaRegions = Lists.newArrayList();
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for (HbckInfo value : regionInfoMap.values()) {
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if (value.metaEntry.isMetaRegion()) {
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if (value.metaEntry != null && value.metaEntry.isMetaRegion()) {
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metaRegions.add(value);
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}
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}
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// If something is wrong
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if (metaRegions.size() != 1) {
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HRegionLocation rootLocation = connection.locateRegion(
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HConstants.ROOT_TABLE_NAME, HConstants.EMPTY_START_ROW);
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HbckInfo root =
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regionInfoMap.get(rootLocation.getRegionInfo().getEncodedName());
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// If there is no region holding .META.
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if (metaRegions.size() == 0) {
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// There will be always one entry in regionInfoMap corresponding to .META.
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// Check the deployed servers. It should be exactly one server.
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HbckInfo metaHbckInfo = metaRegions.get(0);
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List<ServerName> servers = metaHbckInfo.deployedOn;
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if (servers.size() != 1) {
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if (servers.size() == 0) {
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errors.reportError(ERROR_CODE.NO_META_REGION, ".META. is not found on any region.");
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if (shouldFixAssignments()) {
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errors.print("Trying to fix a problem with .META...");
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setShouldRerun();
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// try to fix it (treat it as unassigned region)
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HBaseFsckRepair.fixUnassigned(admin, root.metaEntry);
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HBaseFsckRepair.waitUntilAssigned(admin, root.getHdfsHRI());
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HBaseFsckRepair.fixUnassigned(admin, metaHbckInfo.metaEntry);
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HBaseFsckRepair.waitUntilAssigned(admin, metaHbckInfo.metaEntry);
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}
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}
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// If there are more than one regions pretending to hold the .META.
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else if (metaRegions.size() > 1) {
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errors.reportError(ERROR_CODE.MULTI_META_REGION, ".META. is found on more than one region.");
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} else if (servers.size() > 1) {
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errors
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.reportError(ERROR_CODE.MULTI_META_REGION, ".META. is found on more than one region.");
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if (shouldFixAssignments()) {
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errors.print("Trying to fix a problem with .META...");
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setShouldRerun();
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// try fix it (treat is a dupe assignment)
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List <ServerName> deployedOn = Lists.newArrayList();
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for (HbckInfo mRegion : metaRegions) {
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deployedOn.add(mRegion.metaEntry.regionServer);
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}
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HBaseFsckRepair.fixMultiAssignment(admin, root.metaEntry, deployedOn);
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HBaseFsckRepair.fixMultiAssignment(admin, metaHbckInfo.metaEntry, servers);
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}
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}
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// rerun hbck with hopefully fixed META
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@ -2545,15 +2549,6 @@ public class HBaseFsck extends Configured implements Tool {
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* @throws IOException if an error is encountered
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*/
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boolean loadMetaEntries() throws IOException {
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// get a list of all regions from the master. This involves
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// scanning the META table
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if (!recordMetaRegion()) {
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// Will remove later if we can fix it
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errors.reportError("Fatal error: unable to get root region location. Exiting...");
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return false;
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}
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MetaScannerVisitor visitor = new MetaScannerVisitorBase() {
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int countRecord = 1;
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@ -2587,9 +2582,12 @@ public class HBaseFsck extends Configured implements Tool {
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}
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PairOfSameType<HRegionInfo> daughters = HRegionInfo.getDaughterRegions(result);
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MetaEntry m = new MetaEntry(hri, sn, ts, daughters.getFirst(), daughters.getSecond());
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HbckInfo hbInfo = new HbckInfo(m);
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HbckInfo previous = regionInfoMap.put(hri.getEncodedName(), hbInfo);
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if (previous != null) {
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HbckInfo previous = regionInfoMap.get(hri.getEncodedName());
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if (previous == null) {
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regionInfoMap.put(hri.getEncodedName(), new HbckInfo(m));
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} else if (previous.metaEntry == null) {
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previous.metaEntry = m;
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} else {
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throw new IOException("Two entries in META are same " + previous);
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}
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@ -60,15 +60,16 @@ import org.apache.hadoop.hbase.MiniHBaseCluster;
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import org.apache.hadoop.hbase.ServerName;
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import org.apache.hadoop.hbase.catalog.MetaEditor;
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import org.apache.hadoop.hbase.client.Delete;
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import org.apache.hadoop.hbase.client.Durability;
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import org.apache.hadoop.hbase.client.Get;
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import org.apache.hadoop.hbase.client.HBaseAdmin;
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import org.apache.hadoop.hbase.client.HConnection;
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import org.apache.hadoop.hbase.client.HConnectionManager;
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import org.apache.hadoop.hbase.client.HTable;
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import org.apache.hadoop.hbase.client.Put;
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import org.apache.hadoop.hbase.client.Result;
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import org.apache.hadoop.hbase.client.ResultScanner;
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import org.apache.hadoop.hbase.client.Scan;
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import org.apache.hadoop.hbase.client.Durability;
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import org.apache.hadoop.hbase.io.hfile.TestHFile;
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import org.apache.hadoop.hbase.master.AssignmentManager;
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import org.apache.hadoop.hbase.master.HMaster;
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@ -231,7 +232,9 @@ public class TestHBaseFsck {
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HRegionInfo hri) throws IOException, InterruptedException {
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try {
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HBaseFsckRepair.closeRegionSilentlyAndWait(admin, sn, hri);
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admin.offline(hri.getRegionName());
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if (!hri.isMetaTable()) {
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admin.offline(hri.getRegionName());
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}
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} catch (IOException ioe) {
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LOG.warn("Got exception when attempting to offline region "
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+ Bytes.toString(hri.getRegionName()), ioe);
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@ -2000,6 +2003,57 @@ public class TestHBaseFsck {
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writeLock.release(); // release for clean state
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}
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@Test
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public void testMetaOffline() throws Exception {
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// check no errors
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HBaseFsck hbck = doFsck(conf, false);
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assertNoErrors(hbck);
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deleteMetaRegion(conf, true, false, false);
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hbck = doFsck(conf, false);
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// ERROR_CODE.UNKNOWN is coming because we reportError with a message for the .META.
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// inconsistency and whether we will be fixing it or not.
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assertErrors(hbck, new ERROR_CODE[] { ERROR_CODE.NO_META_REGION, ERROR_CODE.UNKNOWN });
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hbck = doFsck(conf, true);
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assertErrors(hbck, new ERROR_CODE[] { ERROR_CODE.NO_META_REGION, ERROR_CODE.UNKNOWN });
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hbck = doFsck(conf, false);
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assertNoErrors(hbck);
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}
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private void deleteMetaRegion(Configuration conf, boolean unassign, boolean hdfs,
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boolean regionInfoOnly) throws IOException, InterruptedException {
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HConnection connection = HConnectionManager.getConnection(conf);
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HRegionLocation metaLocation = connection.locateRegion(HConstants.META_TABLE_NAME,
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HConstants.EMPTY_START_ROW);
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ServerName hsa = new ServerName(metaLocation.getHostnamePort(), 0L);
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HRegionInfo hri = metaLocation.getRegionInfo();
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if (unassign) {
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LOG.info("Undeploying meta region " + hri + " from server " + hsa);
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undeployRegion(new HBaseAdmin(conf), hsa, hri);
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}
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if (regionInfoOnly) {
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LOG.info("deleting hdfs .regioninfo data: " + hri.toString() + hsa.toString());
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Path rootDir = FSUtils.getRootDir(conf);
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FileSystem fs = rootDir.getFileSystem(conf);
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Path p = new Path(rootDir + "/" + HTableDescriptor.META_TABLEDESC.getNameAsString(),
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hri.getEncodedName());
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Path hriPath = new Path(p, HRegionFileSystem.REGION_INFO_FILE);
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fs.delete(hriPath, true);
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}
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if (hdfs) {
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LOG.info("deleting hdfs data: " + hri.toString() + hsa.toString());
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Path rootDir = FSUtils.getRootDir(conf);
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FileSystem fs = rootDir.getFileSystem(conf);
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Path p = new Path(rootDir + "/" + HTableDescriptor.META_TABLEDESC.getNameAsString(),
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hri.getEncodedName());
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HBaseFsck.debugLsr(conf, p);
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boolean success = fs.delete(p, true);
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LOG.info("Deleted " + p + " sucessfully? " + success);
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HBaseFsck.debugLsr(conf, p);
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}
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}
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@org.junit.Rule
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public TestName name = new TestName();
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}
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