org.apache.hadoop.hive.metastore.tools.HiveMetaTool Maven / Gradle / Ivy
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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hive.metastore.tools;
import java.net.URI;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.CommandLineParser;
import org.apache.commons.cli.GnuParser;
import org.apache.commons.cli.HelpFormatter;
import org.apache.commons.cli.Option;
import org.apache.commons.cli.OptionBuilder;
import org.apache.commons.cli.Options;
import org.apache.commons.cli.ParseException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hive.conf.HiveConf;
import org.apache.hadoop.hive.metastore.ObjectStore;
/**
* This class provides Hive admins a tool to
* - execute JDOQL against the metastore using DataNucleus
* - perform HA name node upgrade
*/
public class HiveMetaTool {
private static final Log LOG = LogFactory.getLog(HiveMetaTool.class.getName());
private final Options cmdLineOptions = new Options();
private ObjectStore objStore;
private boolean isObjStoreInitialized;
public HiveMetaTool() {
this.isObjStoreInitialized = false;
}
@SuppressWarnings("static-access")
private void init() {
System.out.println("Initializing HiveMetaTool..");
Option help = new Option("help", "print this message");
Option listFSRoot = new Option("listFSRoot", "print the current FS root locations");
Option executeJDOQL =
OptionBuilder.withArgName("query-string")
.hasArgs()
.withDescription("execute the given JDOQL query")
.create("executeJDOQL");
/* Ideally we want to specify the different arguments to updateLocation as separate argNames.
* However if we did that, HelpFormatter swallows all but the last argument. Note that this is
* a know issue with the HelpFormatter class that has not been fixed. We specify all arguments
* with a single argName to workaround this HelpFormatter bug.
*/
Option updateFSRootLoc =
OptionBuilder
.withArgName("new-loc> " + " hdfsRoots = objStore.listFSRoots();
if (hdfsRoots != null) {
System.out.println("Listing FS Roots..");
for (String s : hdfsRoots) {
System.out.println(s);
}
} else {
System.err.println("Encountered error during listFSRoot - " +
"commit of JDO transaction failed");
}
}
private void executeJDOQLSelect(String query) {
HiveConf hiveConf = new HiveConf(HiveMetaTool.class);
initObjectStore(hiveConf);
System.out.println("Executing query: " + query);
Collection result = objStore.executeJDOQLSelect(query);
if (result != null) {
Iterator iter = result.iterator();
while (iter.hasNext()) {
Object o = iter.next();
System.out.println(o.toString());
}
} else {
System.err.println("Encountered error during executeJDOQLSelect -" +
"commit of JDO transaction failed.");
}
}
private long executeJDOQLUpdate(String query) {
HiveConf hiveConf = new HiveConf(HiveMetaTool.class);
initObjectStore(hiveConf);
System.out.println("Executing query: " + query);
long numUpdated = objStore.executeJDOQLUpdate(query);
if (numUpdated >= 0) {
System.out.println("Number of records updated: " + numUpdated);
} else {
System.err.println("Encountered error during executeJDOQL -" +
"commit of JDO transaction failed.");
}
return numUpdated;
}
private int printUpdateLocations(Map updateLocations) {
int count = 0;
for (String key: updateLocations.keySet()) {
String value = updateLocations.get(key);
System.out.println("old location: " + key + " new location: " + value);
count++;
}
return count;
}
private void printTblURIUpdateSummary(ObjectStore.UpdateMStorageDescriptorTblURIRetVal retVal,
boolean isDryRun) {
String tblName = new String("SDS");
String fieldName = new String("LOCATION");
if (retVal == null) {
System.err.println("Encountered error while executing updateMStorageDescriptorTblURI - " +
"commit of JDO transaction failed. Failed to update FSRoot locations in " +
fieldName + "field in " + tblName + " table.");
} else {
Map updateLocations = retVal.getUpdateLocations();
if (isDryRun) {
System.out.println("Dry Run of updateLocation on table " + tblName + "..");
} else {
System.out.println("Successfully updated the following locations..");
}
int count = printUpdateLocations(updateLocations);
if (isDryRun) {
System.out.println("Found " + count + " records in " + tblName + " table to update");
} else {
System.out.println("Updated " + count + " records in " + tblName + " table");
}
List badRecords = retVal.getBadRecords();
if (badRecords.size() > 0) {
System.err.println("Warning: Found records with bad " + fieldName + " in " +
tblName + " table.. ");
for (String badRecord:badRecords) {
System.err.println("bad location URI: " + badRecord);
}
}
}
}
private void printDatabaseURIUpdateSummary(ObjectStore.UpdateMDatabaseURIRetVal retVal,
boolean isDryRun) {
String tblName = new String("DBS");
String fieldName = new String("LOCATION_URI");
if (retVal == null) {
System.err.println("Encountered error while executing updateMDatabaseURI - " +
"commit of JDO transaction failed. Failed to update FSRoot locations in " +
fieldName + "field in " + tblName + " table.");
} else {
Map updateLocations = retVal.getUpdateLocations();
if (isDryRun) {
System.out.println("Dry Run of updateLocation on table " + tblName + "..");
} else {
System.out.println("Successfully updated the following locations..");
}
int count = printUpdateLocations(updateLocations);
if (isDryRun) {
System.out.println("Found " + count + " records in " + tblName + " table to update");
} else {
System.out.println("Updated " + count + " records in " + tblName + " table");
}
List badRecords = retVal.getBadRecords();
if (badRecords.size() > 0) {
System.err.println("Warning: Found records with bad " + fieldName + " in " +
tblName + " table.. ");
for (String badRecord:badRecords) {
System.err.println("bad location URI: " + badRecord);
}
}
}
}
private void printPropURIUpdateSummary(ObjectStore.UpdatePropURIRetVal retVal, String
tablePropKey, boolean isDryRun, String tblName, String methodName) {
if (retVal == null) {
System.err.println("Encountered error while executing " + methodName + " - " +
"commit of JDO transaction failed. Failed to update FSRoot locations in " +
"value field corresponding to" + tablePropKey + " in " + tblName + " table.");
} else {
Map updateLocations = retVal.getUpdateLocations();
if (isDryRun) {
System.out.println("Dry Run of updateLocation on table " + tblName + "..");
} else {
System.out.println("Successfully updated the following locations..");
}
int count = printUpdateLocations(updateLocations);
if (isDryRun) {
System.out.println("Found " + count + " records in " + tblName + " table to update");
} else {
System.out.println("Updated " + count + " records in " + tblName + " table");
}
List badRecords = retVal.getBadRecords();
if (badRecords.size() > 0) {
System.err.println("Warning: Found records with bad " + tablePropKey + " key in " +
tblName + " table.. ");
for (String badRecord:badRecords) {
System.err.println("bad location URI: " + badRecord);
}
}
}
}
private void printSerdePropURIUpdateSummary(ObjectStore.UpdateSerdeURIRetVal retVal,
String serdePropKey, boolean isDryRun) {
String tblName = new String("SERDE_PARAMS");
if (retVal == null) {
System.err.println("Encountered error while executing updateSerdeURI - " +
"commit of JDO transaction failed. Failed to update FSRoot locations in " +
"value field corresponding to " + serdePropKey + " in " + tblName + " table.");
} else {
Map updateLocations = retVal.getUpdateLocations();
if (isDryRun) {
System.out.println("Dry Run of updateLocation on table " + tblName + "..");
} else {
System.out.println("Successfully updated the following locations..");
}
int count = printUpdateLocations(updateLocations);
if (isDryRun) {
System.out.println("Found " + count + " records in " + tblName + " table to update");
} else {
System.out.println("Updated " + count + " records in " + tblName + " table");
}
List badRecords = retVal.getBadRecords();
if (badRecords.size() > 0) {
System.err.println("Warning: Found records with bad " + serdePropKey + " key in " +
tblName + " table.. ");
for (String badRecord:badRecords) {
System.err.println("bad location URI: " + badRecord);
}
}
}
}
public void updateFSRootLocation(URI oldURI, URI newURI, String serdePropKey, String
tablePropKey, boolean isDryRun) {
HiveConf hiveConf = new HiveConf(HiveMetaTool.class);
initObjectStore(hiveConf);
System.out.println("Looking for LOCATION_URI field in DBS table to update..");
ObjectStore.UpdateMDatabaseURIRetVal updateMDBURIRetVal = objStore.updateMDatabaseURI(oldURI,
newURI, isDryRun);
printDatabaseURIUpdateSummary(updateMDBURIRetVal, isDryRun);
System.out.println("Looking for LOCATION field in SDS table to update..");
ObjectStore.UpdateMStorageDescriptorTblURIRetVal updateTblURIRetVal =
objStore.updateMStorageDescriptorTblURI(oldURI, newURI, isDryRun);
printTblURIUpdateSummary(updateTblURIRetVal, isDryRun);
if (tablePropKey != null) {
System.out.println("Looking for value of " + tablePropKey + " key in TABLE_PARAMS table " +
"to update..");
ObjectStore.UpdatePropURIRetVal updateTblPropURIRetVal =
objStore.updateTblPropURI(oldURI, newURI,
tablePropKey, isDryRun);
printPropURIUpdateSummary(updateTblPropURIRetVal, tablePropKey, isDryRun, "TABLE_PARAMS",
"updateTblPropURI");
System.out.println("Looking for value of " + tablePropKey + " key in SD_PARAMS table " +
"to update..");
ObjectStore.UpdatePropURIRetVal updatePropURIRetVal = objStore
.updateMStorageDescriptorTblPropURI(oldURI, newURI, tablePropKey, isDryRun);
printPropURIUpdateSummary(updatePropURIRetVal, tablePropKey, isDryRun, "SD_PARAMS",
"updateMStorageDescriptorTblPropURI");
}
if (serdePropKey != null) {
System.out.println("Looking for value of " + serdePropKey + " key in SERDE_PARAMS table " +
"to update..");
ObjectStore.UpdateSerdeURIRetVal updateSerdeURIretVal = objStore.updateSerdeURI(oldURI,
newURI, serdePropKey, isDryRun);
printSerdePropURIUpdateSummary(updateSerdeURIretVal, serdePropKey, isDryRun);
}
}
private static void printAndExit(HiveMetaTool metaTool) {
HelpFormatter formatter = new HelpFormatter();
formatter.printHelp("metatool", metaTool.cmdLineOptions);
System.exit(1);
}
public static void main(String[] args) {
HiveMetaTool metaTool = new HiveMetaTool();
metaTool.init();
CommandLineParser parser = new GnuParser();
CommandLine line = null;
try {
try {
line = parser.parse(metaTool.cmdLineOptions, args);
} catch (ParseException e) {
System.err.println("HiveMetaTool:Parsing failed. Reason: " + e.getLocalizedMessage());
printAndExit(metaTool);
}
if (line.hasOption("help")) {
HelpFormatter formatter = new HelpFormatter();
formatter.printHelp("metatool", metaTool.cmdLineOptions);
} else if (line.hasOption("listFSRoot")) {
if (line.hasOption("dryRun")) {
System.err.println("HiveMetaTool: dryRun is not valid with listFSRoot");
printAndExit(metaTool);
} else if (line.hasOption("serdePropKey")) {
System.err.println("HiveMetaTool: serdePropKey is not valid with listFSRoot");
printAndExit(metaTool);
} else if (line.hasOption("tablePropKey")) {
System.err.println("HiveMetaTool: tablePropKey is not valid with listFSRoot");
printAndExit(metaTool);
}
metaTool.listFSRoot();
} else if (line.hasOption("executeJDOQL")) {
String query = line.getOptionValue("executeJDOQL");
if (line.hasOption("dryRun")) {
System.err.println("HiveMetaTool: dryRun is not valid with executeJDOQL");
printAndExit(metaTool);
} else if (line.hasOption("serdePropKey")) {
System.err.println("HiveMetaTool: serdePropKey is not valid with executeJDOQL");
printAndExit(metaTool);
} else if (line.hasOption("tablePropKey")) {
System.err.println("HiveMetaTool: tablePropKey is not valid with executeJDOQL");
printAndExit(metaTool);
}
if (query.toLowerCase().trim().startsWith("select")) {
metaTool.executeJDOQLSelect(query);
} else if (query.toLowerCase().trim().startsWith("update")) {
metaTool.executeJDOQLUpdate(query);
} else {
System.err.println("HiveMetaTool:Unsupported statement type");
printAndExit(metaTool);
}
} else if (line.hasOption("updateLocation")) {
String[] loc = line.getOptionValues("updateLocation");
boolean isDryRun = false;
String serdepropKey = null;
String tablePropKey = null;
if (loc.length != 2 && loc.length != 3) {
System.err.println("HiveMetaTool:updateLocation takes in 2 required and 1 " +
"optional arguments but " +
"was passed " + loc.length + " arguments");
printAndExit(metaTool);
}
Path newPath = new Path(loc[0]);
Path oldPath = new Path(loc[1]);
URI oldURI = oldPath.toUri();
URI newURI = newPath.toUri();
if (line.hasOption("dryRun")) {
isDryRun = true;
}
if (line.hasOption("serdePropKey")) {
serdepropKey = line.getOptionValue("serdePropKey");
}
if (line.hasOption("tablePropKey")) {
tablePropKey = line.getOptionValue("tablePropKey");
}
/*
* validate input - Both new and old URI should contain valid host names and valid schemes.
* port is optional in both the URIs since HDFS HA NN URI doesn't have a port.
*/
if (oldURI.getHost() == null || newURI.getHost() == null) {
System.err.println("HiveMetaTool:A valid host is required in both old-loc and new-loc");
} else if (oldURI.getScheme() == null || newURI.getScheme() == null) {
System.err.println("HiveMetaTool:A valid scheme is required in both old-loc and new-loc");
} else {
metaTool.updateFSRootLocation(oldURI, newURI, serdepropKey, tablePropKey, isDryRun);
}
} else {
if (line.hasOption("dryRun")) {
System.err.println("HiveMetaTool: dryRun is not a valid standalone option");
} else if (line.hasOption("serdePropKey")) {
System.err.println("HiveMetaTool: serdePropKey is not a valid standalone option");
} else if (line.hasOption("tablePropKey")) {
System.err.println("HiveMetaTool: tablePropKey is not a valid standalone option");
printAndExit(metaTool);
} else {
System.err.print("HiveMetaTool:Parsing failed. Reason: Invalid arguments: " );
for (String s : line.getArgs()) {
System.err.print(s + " ");
}
System.err.println();
}
printAndExit(metaTool);
}
} finally {
metaTool.shutdownObjectStore();
}
}
}