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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "pending_bucket_space_db_transition_entry.h"
#include "clusterinformation.h"
#include <vespa/storage/common/storagelink.h>
#include <vespa/storageapi/message/bucket.h>
#include <vespa/storageapi/message/state.h>
#include <vespa/storageframework/generic/clock/clock.h>
#include <vespa/vdslib/state/cluster_state_bundle.h>
#include <vespa/vespalib/util/xmlserializable.h>
#include "outdated_nodes_map.h"
#include <unordered_map>
#include <deque>
namespace storage::distributor {
class DistributorMessageSender;
class PendingBucketSpaceDbTransition;
class DistributorBucketSpaceRepo;
class StripeAccessGuard;
/**
* Class used by TopLevelBucketDBUpdater to track request bucket info
* messages sent to the storage nodes.
*/
class PendingClusterState : public vespalib::XmlSerializable {
public:
using OutdatedNodes = dbtransition::OutdatedNodes;
using OutdatedNodesMap = dbtransition::OutdatedNodesMap;
struct Summary {
Summary(const std::string& prevClusterState, const std::string& newClusterState, uint32_t processingTime);
Summary(const Summary &);
Summary & operator = (const Summary &);
Summary(Summary &&) = default;
Summary & operator = (Summary &&) = default;
~Summary();
std::string _prevClusterState;
std::string _newClusterState;
uint32_t _processingTime;
};
static std::unique_ptr<PendingClusterState> createForClusterStateChange(
const framework::Clock& clock,
const ClusterInformation::CSP& clusterInfo,
DistributorMessageSender& sender,
DistributorBucketSpaceRepo& bucketSpaceRepo,
const std::shared_ptr<api::SetSystemStateCommand>& newStateCmd,
const OutdatedNodesMap &outdatedNodesMap,
api::Timestamp creationTimestamp)
{
// Naked new due to private constructor
return std::unique_ptr<PendingClusterState>(new PendingClusterState(
clock, clusterInfo, sender, bucketSpaceRepo,
newStateCmd, outdatedNodesMap, creationTimestamp));
}
/**
* Distribution changes always need to ask all storage nodes, so no
* need to do an union of existing outdated nodes; implicit complete set.
*/
static std::unique_ptr<PendingClusterState> createForDistributionChange(
const framework::Clock& clock,
const ClusterInformation::CSP& clusterInfo,
DistributorMessageSender& sender,
DistributorBucketSpaceRepo& bucketSpaceRepo,
api::Timestamp creationTimestamp)
{
// Naked new due to private constructor
return std::unique_ptr<PendingClusterState>(new PendingClusterState(
clock, clusterInfo, sender, bucketSpaceRepo, creationTimestamp));
}
PendingClusterState(const PendingClusterState &) = delete;
PendingClusterState & operator = (const PendingClusterState &) = delete;
~PendingClusterState() override;
/**
* Adds the info from the reply to our list of information.
* Returns true if the reply was accepted by this object, false if not.
*/
bool onRequestBucketInfoReply(const std::shared_ptr<api::RequestBucketInfoReply>& reply);
/**
* Tags the given node as having replied to at least one of the
* request bucket info commands. Only used for debug logging.
*/
void setNodeReplied(uint16_t nodeIdx) {
_requestedNodes[nodeIdx] = true;
}
/** Called to resend delayed resends due to failures. */
void resendDelayedMessages();
/**
* Returns true if all the nodes we requested have replied to
* the request bucket info commands.
*/
bool done() {
return _sentMessages.empty() && _delayedRequests.empty();
}
bool hasBucketOwnershipTransfer() const noexcept {
return _bucketOwnershipTransfer;
}
bool hasCommand() const noexcept {
return (_cmd.get() != nullptr);
}
std::shared_ptr<api::SetSystemStateCommand> getCommand() {
return _cmd;
}
bool isVersionedTransition() const noexcept {
return _isVersionedTransition;
}
uint32_t clusterStateVersion() const noexcept {
return _clusterStateVersion;
}
bool isDeferred() const noexcept {
return (isVersionedTransition()
&& _newClusterStateBundle.deferredActivation());
}
void clearCommand() {
_cmd.reset();
}
const lib::ClusterStateBundle& getNewClusterStateBundle() const {
return _newClusterStateBundle;
}
/**
* Returns the union set of the outdated node set provided at construction
* time and the set of nodes that the pending cluster state figured out
* were outdated based on the cluster state diff. If the pending cluster
* state was constructed for a distribution config change, this set will
* be equal to the set of all available storage nodes.
*/
OutdatedNodesMap getOutdatedNodesMap() const;
/**
* Merges all the results with the corresponding bucket databases.
*/
void mergeIntoBucketDatabases();
void merge_into_bucket_databases(StripeAccessGuard& guard);
// Get pending transition for a specific bucket space. Only used by unit test.
PendingBucketSpaceDbTransition &getPendingBucketSpaceDbTransition(document::BucketSpace bucketSpace);
void printXml(vespalib::XmlOutputStream&) const override;
Summary getSummary() const;
std::string requestNodesToString() const;
private:
// With 100ms resend timeout, this requires a particular node to have failed
// for _at least_ threshold/10 seconds before a log warning is emitted.
constexpr static size_t RequestFailureWarningEdgeTriggerThreshold = 200;
/**
* Creates a pending cluster state that represents
* a set system state command from the cluster controller.
*/
PendingClusterState(
const framework::Clock&,
const ClusterInformation::CSP& clusterInfo,
DistributorMessageSender& sender,
DistributorBucketSpaceRepo& bucketSpaceRepo,
const std::shared_ptr<api::SetSystemStateCommand>& newStateCmd,
const OutdatedNodesMap &outdatedNodesMap,
api::Timestamp creationTimestamp);
/**
* Creates a pending cluster state that represents a distribution
* change.
*/
PendingClusterState(
const framework::Clock&,
const ClusterInformation::CSP& clusterInfo,
DistributorMessageSender& sender,
DistributorBucketSpaceRepo& bucketSpaceRepo,
api::Timestamp creationTimestamp);
struct BucketSpaceAndNode {
document::BucketSpace bucketSpace;
uint16_t node;
BucketSpaceAndNode(document::BucketSpace bucketSpace_,
uint16_t node_)
: bucketSpace(bucketSpace_),
node(node_)
{
}
};
void initializeBucketSpaceTransitions(bool distributionChanged, const OutdatedNodesMap &outdatedNodesMap);
void logConstructionInformation() const;
void requestNode(BucketSpaceAndNode bucketSpaceAndNode);
void requestNodes();
void requestBucketInfoFromStorageNodesWithChangedState();
/**
* Number of nodes with node type 'storage' in _newClusterState.
*/
uint16_t newStateStorageNodeCount() const;
bool shouldRequestBucketInfo() const;
bool clusterIsDown() const;
bool iAmDown() const;
bool storageNodeUpInNewState(document::BucketSpace bucketSpace, uint16_t node) const;
std::string getNewClusterStateBundleString() const;
std::string getPrevClusterStateBundleString() const;
void update_reply_failure_statistics(const api::ReturnCode& result, const BucketSpaceAndNode& source);
std::shared_ptr<api::SetSystemStateCommand> _cmd;
std::map<uint64_t, BucketSpaceAndNode> _sentMessages;
std::vector<bool> _requestedNodes;
std::deque<std::pair<framework::MilliSecTime, BucketSpaceAndNode> > _delayedRequests;
lib::ClusterStateBundle _prevClusterStateBundle;
lib::ClusterStateBundle _newClusterStateBundle;
const framework::Clock& _clock;
ClusterInformation::CSP _clusterInfo;
api::Timestamp _creationTimestamp;
DistributorMessageSender& _sender;
DistributorBucketSpaceRepo& _bucketSpaceRepo;
uint32_t _clusterStateVersion;
bool _isVersionedTransition;
bool _bucketOwnershipTransfer;
std::unordered_map<document::BucketSpace, std::unique_ptr<PendingBucketSpaceDbTransition>, document::BucketSpace::hash> _pendingTransitions;
};
}
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