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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.cassandra.service;
import java.io.DataInput;
import java.io.IOException;
import java.net.InetAddress;
import java.util.*;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.*;
import com.palantir.tracing.CloseableTracer;
import java.lang.management.ManagementFactory;
import java.lang.management.RuntimeMXBean;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.cassandra.concurrent.ScheduledExecutors;
import org.apache.cassandra.concurrent.Stage;
import org.apache.cassandra.concurrent.StageManager;
import org.apache.cassandra.config.CFMetaData;
import org.apache.cassandra.config.KSMetaData;
import org.apache.cassandra.config.Schema;
import org.apache.cassandra.cql3.functions.UDAggregate;
import org.apache.cassandra.cql3.functions.UDFunction;
import org.apache.cassandra.db.*;
import org.apache.cassandra.db.marshal.UserType;
import org.apache.cassandra.exceptions.AlreadyExistsException;
import org.apache.cassandra.exceptions.ConfigurationException;
import org.apache.cassandra.gms.*;
import org.apache.cassandra.io.IVersionedSerializer;
import org.apache.cassandra.io.util.DataOutputPlus;
import org.apache.cassandra.net.MessageOut;
import org.apache.cassandra.net.MessagingService;
import org.apache.cassandra.schema.LegacySchemaTables;
import org.apache.cassandra.utils.FBUtilities;
import org.apache.cassandra.utils.WrappedRunnable;
public class MigrationManager
{
private static final Logger logger = LoggerFactory.getLogger(MigrationManager.class);
public static final MigrationManager instance = new MigrationManager();
private static final RuntimeMXBean runtimeMXBean = ManagementFactory.getRuntimeMXBean();
public static final int MIGRATION_DELAY_IN_MS = 60000;
private final List listeners = new CopyOnWriteArrayList<>();
private MigrationManager() {}
public void register(MigrationListener listener)
{
listeners.add(listener);
}
public void unregister(MigrationListener listener)
{
listeners.remove(listener);
}
public void scheduleSchemaPull(InetAddress endpoint, EndpointState state) {
scheduleSchemaPull(endpoint, state, false);
}
public void scheduleSchemaPull(InetAddress endpoint, EndpointState state, boolean onChange)
{
VersionedValue value = state.getApplicationState(ApplicationState.SCHEMA);
if (!endpoint.equals(FBUtilities.getBroadcastAddress()) && value != null)
maybeScheduleSchemaPull(UUID.fromString(value.value), endpoint, state.getApplicationState(ApplicationState.RELEASE_VERSION).value, onChange);
}
/**
* If versions differ this node sends request with local migration list to the endpoint
* and expecting to receive a list of migrations to apply locally.
*/
private static void maybeScheduleSchemaPull(final UUID theirVersion, final InetAddress endpoint, String releaseVersion, boolean onChange)
{
String ourMajorVersion = FBUtilities.getReleaseVersionMajor();
if (!releaseVersion.startsWith(ourMajorVersion))
{
logger.debug("Not pulling schema because release version in Gossip is not major version {}, it is {}", ourMajorVersion, releaseVersion);
return;
}
if ((Schema.instance.getVersion() != null && Schema.instance.getVersion().equals(theirVersion)) || !shouldPullSchemaFrom(endpoint))
{
logger.debug("Not pulling schema because versions match or shouldPullSchemaFrom returned false");
return;
}
if (Schema.emptyVersion.equals(Schema.instance.getVersion()) || runtimeMXBean.getUptime() < MIGRATION_DELAY_IN_MS)
{
// If we think we may be bootstrapping or have recently started, submit MigrationTask immediately
logger.debug("Submitting migration task for {}", endpoint);
submitMigrationTask(endpoint);
}
if (onChange && Boolean.getBoolean("palantir_cassandra.unsafe_schema_migration"))
{
// if we're scheduling due to a schema change (and not because a node is newly alive or joined)
// and we're in unsafe_schema_migration mode, then don't submit a MigrationTask
logger.warn("Not pulling schema because of schema change while in unsafe schema migration mode");
return;
}
else
{
// Include a delay to make sure we have a chance to apply any changes being
// pushed out simultaneously. See CASSANDRA-5025
Runnable runnable = new Runnable()
{
public void run()
{
// grab the latest version of the schema since it may have changed again since the initial scheduling
EndpointState epState = Gossiper.instance.getEndpointStateForEndpoint(endpoint);
if (epState == null)
{
logger.debug("epState vanished for {}, not submitting migration task", endpoint);
return;
}
VersionedValue value = epState.getApplicationState(ApplicationState.SCHEMA);
UUID currentVersion = UUID.fromString(value.value);
if (!currentVersion.equals(theirVersion))
{
logger.debug("A subsequent change has been made to the other endpoint's schema version and " +
"so we should wait for the subsequently scheduled task instead of trying to do the " +
"work in this one. Endpoint: {}; Former schema version: {}; Current schema version: {}",
endpoint,
theirVersion,
currentVersion);
return;
}
if (Schema.instance.getVersion().equals(currentVersion))
{
logger.debug("not submitting migration task for {} because our versions match", endpoint);
return;
}
logger.debug("submitting migration task for endpoint {}, endpoint schema version {}, and our schema version",
endpoint,
currentVersion,
Schema.instance.getVersion());
submitMigrationTask(endpoint);
}
};
ScheduledExecutors.nonPeriodicTasks.schedule(runnable, MIGRATION_DELAY_IN_MS, TimeUnit.MILLISECONDS);
}
}
private static Future submitMigrationTask(InetAddress endpoint)
{
/*
* Do not de-ref the future because that causes distributed deadlock (CASSANDRA-3832) because we are
* running in the gossip stage.
*/
return StageManager.getStage(Stage.MIGRATION).submit(new MigrationTask(endpoint));
}
public static boolean shouldPullSchemaFrom(InetAddress endpoint)
{
/*
* Don't request schema from nodes with a differnt or unknonw major version (may have incompatible schema)
* Don't request schema from fat clients
*/
return MessagingService.instance().knowsVersion(endpoint)
&& MessagingService.instance().getRawVersion(endpoint) == MessagingService.current_version
&& !Gossiper.instance.isGossipOnlyMember(endpoint);
}
public static boolean isReadyForBootstrap()
{
return ((ThreadPoolExecutor) StageManager.getStage(Stage.MIGRATION)).getActiveCount() == 0;
}
public void notifyCreateKeyspace(KSMetaData ksm)
{
for (MigrationListener listener : listeners)
listener.onCreateKeyspace(ksm.name);
}
public void notifyCreateColumnFamily(CFMetaData cfm)
{
for (MigrationListener listener : listeners)
listener.onCreateColumnFamily(cfm.ksName, cfm.cfName);
}
public void notifyCreateUserType(UserType ut)
{
for (MigrationListener listener : listeners)
listener.onCreateUserType(ut.keyspace, ut.getNameAsString());
}
public void notifyCreateFunction(UDFunction udf)
{
for (MigrationListener listener : listeners)
listener.onCreateFunction(udf.name().keyspace, udf.name().name, udf.argTypes());
}
public void notifyCreateAggregate(UDAggregate udf)
{
for (MigrationListener listener : listeners)
listener.onCreateAggregate(udf.name().keyspace, udf.name().name, udf.argTypes());
}
public void notifyUpdateKeyspace(KSMetaData ksm)
{
for (MigrationListener listener : listeners)
listener.onUpdateKeyspace(ksm.name);
}
public void notifyUpdateColumnFamily(CFMetaData cfm, boolean columnsDidChange)
{
for (MigrationListener listener : listeners)
listener.onUpdateColumnFamily(cfm.ksName, cfm.cfName, columnsDidChange);
}
public void notifyUpdateUserType(UserType ut)
{
for (MigrationListener listener : listeners)
listener.onUpdateUserType(ut.keyspace, ut.getNameAsString());
}
public void notifyUpdateFunction(UDFunction udf)
{
for (MigrationListener listener : listeners)
listener.onUpdateFunction(udf.name().keyspace, udf.name().name, udf.argTypes());
}
public void notifyUpdateAggregate(UDAggregate udf)
{
for (MigrationListener listener : listeners)
listener.onUpdateAggregate(udf.name().keyspace, udf.name().name, udf.argTypes());
}
public void notifyDropKeyspace(KSMetaData ksm)
{
for (MigrationListener listener : listeners)
listener.onDropKeyspace(ksm.name);
}
public void notifyDropColumnFamily(CFMetaData cfm)
{
for (MigrationListener listener : listeners)
listener.onDropColumnFamily(cfm.ksName, cfm.cfName);
}
public void notifyDropUserType(UserType ut)
{
for (MigrationListener listener : listeners)
listener.onDropUserType(ut.keyspace, ut.getNameAsString());
}
public void notifyDropFunction(UDFunction udf)
{
for (MigrationListener listener : listeners)
listener.onDropFunction(udf.name().keyspace, udf.name().name, udf.argTypes());
}
public void notifyDropAggregate(UDAggregate udf)
{
for (MigrationListener listener : listeners)
listener.onDropAggregate(udf.name().keyspace, udf.name().name, udf.argTypes());
}
public static void announceNewKeyspace(KSMetaData ksm) throws ConfigurationException
{
announceNewKeyspace(ksm, false);
}
public static void announceNewKeyspace(KSMetaData ksm, boolean announceLocally) throws ConfigurationException
{
announceNewKeyspace(ksm, FBUtilities.timestampMicros(), announceLocally);
}
public static void announceNewKeyspace(KSMetaData ksm, long timestamp, boolean announceLocally) throws ConfigurationException
{
try (CloseableTracer ignored = CloseableTracer.startSpan("MigrationManager#announceNewKeyspace"))
{
ksm.validate();
if (Schema.instance.getKSMetaData(ksm.name) != null)
throw new AlreadyExistsException(ksm.name);
logger.info(String.format("Create new Keyspace: %s", ksm));
announce(LegacySchemaTables.makeCreateKeyspaceMutation(ksm, timestamp), announceLocally);
}
}
public static void announceNewColumnFamily(CFMetaData cfm) throws ConfigurationException
{
announceNewColumnFamily(cfm, false);
}
public static void announceNewColumnFamily(CFMetaData cfm, boolean announceLocally) throws ConfigurationException
{
announceNewColumnFamily(cfm, announceLocally, true);
}
/**
* Announces the table even if the definition is already know locally.
* This should generally be avoided but is used internally when we want to force the most up to date version of
* a system table schema (Note that we don't know if the schema we force _is_ the most recent version or not, we
* just rely on idempotency to basically ignore that announce if it's not. That's why we can't use announceUpdateColumnFamily,
* it would for instance delete new columns if this is not called with the most up-to-date version)
*
* Note that this is only safe for system tables where we know the cfId is fixed and will be the same whatever version
* of the definition is used.
*/
public static void forceAnnounceNewColumnFamily(CFMetaData cfm) throws ConfigurationException
{
announceNewColumnFamily(cfm, false, false);
}
private static void announceNewColumnFamily(CFMetaData cfm, boolean announceLocally, boolean throwOnDuplicate) throws ConfigurationException
{
cfm.validate();
KSMetaData ksm = Schema.instance.getKSMetaData(cfm.ksName);
if (ksm == null)
throw new ConfigurationException(String.format("Cannot add table '%s' to non existing keyspace '%s'.", cfm.cfName, cfm.ksName));
else if (throwOnDuplicate && ksm.cfMetaData().containsKey(cfm.cfName))
throw new AlreadyExistsException(cfm.ksName, cfm.cfName);
logger.info(String.format("Create new table: %s", cfm));
announce(LegacySchemaTables.makeCreateTableMutation(ksm, cfm, FBUtilities.timestampMicros()), announceLocally);
}
public static void announceNewType(UserType newType, boolean announceLocally)
{
KSMetaData ksm = Schema.instance.getKSMetaData(newType.keyspace);
announce(LegacySchemaTables.makeCreateTypeMutation(ksm, newType, FBUtilities.timestampMicros()), announceLocally);
}
public static void announceNewFunction(UDFunction udf, boolean announceLocally)
{
logger.info(String.format("Create scalar function '%s'", udf.name()));
KSMetaData ksm = Schema.instance.getKSMetaData(udf.name().keyspace);
announce(LegacySchemaTables.makeCreateFunctionMutation(ksm, udf, FBUtilities.timestampMicros()), announceLocally);
}
public static void announceNewAggregate(UDAggregate udf, boolean announceLocally)
{
logger.info(String.format("Create aggregate function '%s'", udf.name()));
KSMetaData ksm = Schema.instance.getKSMetaData(udf.name().keyspace);
announce(LegacySchemaTables.makeCreateAggregateMutation(ksm, udf, FBUtilities.timestampMicros()), announceLocally);
}
public static void announceKeyspaceUpdate(KSMetaData ksm) throws ConfigurationException
{
announceKeyspaceUpdate(ksm, false);
}
public static void announceKeyspaceUpdate(KSMetaData ksm, boolean announceLocally) throws ConfigurationException
{
ksm.validate();
KSMetaData oldKsm = Schema.instance.getKSMetaData(ksm.name);
if (oldKsm == null)
throw new ConfigurationException(String.format("Cannot update non existing keyspace '%s'.", ksm.name));
logger.info(String.format("Update Keyspace '%s' From %s To %s", ksm.name, oldKsm, ksm));
announce(LegacySchemaTables.makeCreateKeyspaceMutation(ksm, FBUtilities.timestampMicros()), announceLocally);
}
public static void announceColumnFamilyUpdate(CFMetaData cfm) throws ConfigurationException
{
announceColumnFamilyUpdate(cfm, false);
}
public static void announceColumnFamilyUpdate(CFMetaData cfm, boolean announceLocally) throws ConfigurationException
{
cfm.validate();
CFMetaData oldCfm = Schema.instance.getCFMetaData(cfm.ksName, cfm.cfName);
if (oldCfm == null)
throw new ConfigurationException(String.format("Cannot update non existing table '%s' in keyspace '%s'.", cfm.cfName, cfm.ksName));
KSMetaData ksm = Schema.instance.getKSMetaData(cfm.ksName);
oldCfm.validateCompatility(cfm);
logger.info(String.format("Update table '%s/%s' From %s To %s", cfm.ksName, cfm.cfName, oldCfm, cfm));
announce(LegacySchemaTables.makeUpdateTableMutation(ksm, oldCfm, cfm, FBUtilities.timestampMicros()), announceLocally);
}
public static void announceTypeUpdate(UserType updatedType, boolean announceLocally)
{
announceNewType(updatedType, announceLocally);
}
public static void announceKeyspaceDrop(String ksName) throws ConfigurationException
{
announceKeyspaceDrop(ksName, false);
}
public static void announceKeyspaceDrop(String ksName, boolean announceLocally) throws ConfigurationException
{
KSMetaData oldKsm = Schema.instance.getKSMetaData(ksName);
if (oldKsm == null)
throw new ConfigurationException(String.format("Cannot drop non existing keyspace '%s'.", ksName));
logger.info(String.format("Drop Keyspace '%s'", oldKsm.name));
announce(LegacySchemaTables.makeDropKeyspaceMutation(oldKsm, FBUtilities.timestampMicros()), announceLocally);
}
public static void announceColumnFamilyDrop(String ksName, String cfName) throws ConfigurationException
{
announceColumnFamilyDrop(ksName, cfName, false);
}
public static void announceColumnFamilyDrop(String ksName, String cfName, boolean announceLocally) throws ConfigurationException
{
CFMetaData oldCfm = Schema.instance.getCFMetaData(ksName, cfName);
if (oldCfm == null)
throw new ConfigurationException(String.format("Cannot drop non existing table '%s' in keyspace '%s'.", cfName, ksName));
KSMetaData ksm = Schema.instance.getKSMetaData(ksName);
logger.info(String.format("Drop table '%s/%s'", oldCfm.ksName, oldCfm.cfName));
announce(LegacySchemaTables.makeDropTableMutation(ksm, oldCfm, FBUtilities.timestampMicros()), announceLocally);
}
public static void announceTypeDrop(UserType droppedType)
{
announceTypeDrop(droppedType, false);
}
public static void announceTypeDrop(UserType droppedType, boolean announceLocally)
{
KSMetaData ksm = Schema.instance.getKSMetaData(droppedType.keyspace);
announce(LegacySchemaTables.dropTypeFromSchemaMutation(ksm, droppedType, FBUtilities.timestampMicros()), announceLocally);
}
public static void announceFunctionDrop(UDFunction udf, boolean announceLocally)
{
logger.info(String.format("Drop scalar function overload '%s' args '%s'", udf.name(), udf.argTypes()));
KSMetaData ksm = Schema.instance.getKSMetaData(udf.name().keyspace);
announce(LegacySchemaTables.makeDropFunctionMutation(ksm, udf, FBUtilities.timestampMicros()), announceLocally);
}
public static void announceAggregateDrop(UDAggregate udf, boolean announceLocally)
{
logger.info(String.format("Drop aggregate function overload '%s' args '%s'", udf.name(), udf.argTypes()));
KSMetaData ksm = Schema.instance.getKSMetaData(udf.name().keyspace);
announce(LegacySchemaTables.makeDropAggregateMutation(ksm, udf, FBUtilities.timestampMicros()), announceLocally);
}
/**
* actively announce a new version to active hosts via rpc
* @param schema The schema mutation to be applied
*/
private static void announce(Mutation schema, boolean announceLocally)
{
if (announceLocally)
{
try (CloseableTracer ignored = CloseableTracer.startSpan("MigrationManager#announce local"))
{
LegacySchemaTables.mergeSchema(Collections.singletonList(schema), false);
}
catch (IOException e)
{
throw new RuntimeException(e);
}
}
else
{
try (CloseableTracer ignored = CloseableTracer.startSpan("MigrationManager#announce not local"))
{
FBUtilities.waitOnFuture(announce(Collections.singletonList(schema)));
}
}
}
private static void pushSchemaMutation(InetAddress endpoint, Collection schema)
{
try (CloseableTracer ignored = CloseableTracer.startSpan("MigrationManager#pushSchemaMutation"))
{
MessageOut> msg = new MessageOut<>(MessagingService.Verb.DEFINITIONS_UPDATE,
schema,
MigrationsSerializer.instance);
MessagingService.instance().sendOneWay(msg, endpoint);
}
}
// Returns a future on the local application of the schema
private static Future announce(final Collection schema)
{
Future f = StageManager.getStage(Stage.MIGRATION).submit(new WrappedRunnable()
{
protected void runMayThrow() throws IOException, ConfigurationException
{
try (CloseableTracer ignored = CloseableTracer.startSpan("MigrationManager#announce merge schema"))
{
LegacySchemaTables.mergeSchema(schema);
}
}
});
Set liveMembers;
try (CloseableTracer ignored = CloseableTracer.startSpan("MigrationManager#announce getLiveMembers"))
{
liveMembers = Gossiper.instance.getLiveMembers();
}
for (InetAddress endpoint : liveMembers)
{
try (CloseableTracer ignored = CloseableTracer.startSpan("MigrationManager#announce announce endpoint"))
{
boolean condition;
try (CloseableTracer ignored1 = CloseableTracer.startSpan("MigrationManager#announce compute condition"))
{
condition = !endpoint.equals(FBUtilities.getBroadcastAddress()) &&
MessagingService.instance().knowsVersion(endpoint) &&
MessagingService.instance().getRawVersion(endpoint) == MessagingService.current_version;
}
// only push schema to nodes with known and equal versions
if (condition) {
logger.debug("Anouncing schema to endpoint {}", endpoint);
logger.trace("Announcing schema {}", schema);
pushSchemaMutation(endpoint, schema);
}
}
}
return f;
}
/**
* Announce my version passively over gossip.
* Used to notify nodes as they arrive in the cluster.
*
* @param version The schema version to announce
*/
public static void passiveAnnounce(UUID version)
{
Gossiper.instance.addLocalApplicationState(ApplicationState.SCHEMA, StorageService.instance.valueFactory.schema(version));
logger.debug("Gossiping my schema version {}", version);
}
/**
* Clear all locally stored schema information and reset schema to initial state.
* Called by user (via JMX) who wants to get rid of schema disagreement.
*
* @throws IOException if schema tables truncation fails
*/
public static void resetLocalSchema() throws IOException
{
logger.info("Starting local schema reset...");
logger.debug("Truncating schema tables...");
LegacySchemaTables.truncateSchemaTables();
logger.debug("Clearing local schema keyspace definitions...");
Schema.instance.clear();
Set liveEndpoints = Gossiper.instance.getLiveMembers();
liveEndpoints.remove(FBUtilities.getBroadcastAddress());
// force migration if there are nodes around
for (InetAddress node : liveEndpoints)
{
if (shouldPullSchemaFrom(node))
{
logger.debug("Requesting schema from {}", node);
FBUtilities.waitOnFuture(submitMigrationTask(node));
break;
}
}
logger.info("Local schema reset is complete.");
}
public static class MigrationsSerializer implements IVersionedSerializer>
{
public static MigrationsSerializer instance = new MigrationsSerializer();
public void serialize(Collection schema, DataOutputPlus out, int version) throws IOException
{
out.writeInt(schema.size());
for (Mutation mutation : schema)
Mutation.serializer.serialize(mutation, out, version);
}
public Collection deserialize(DataInput in, int version) throws IOException
{
int count = in.readInt();
Collection schema = new ArrayList<>(count);
for (int i = 0; i < count; i++)
schema.add(Mutation.serializer.deserialize(in, version));
return schema;
}
public long serializedSize(Collection schema, int version)
{
int size = TypeSizes.NATIVE.sizeof(schema.size());
for (Mutation mutation : schema)
size += Mutation.serializer.serializedSize(mutation, version);
return size;
}
}
}