Package com.linkedin.davinci.kafka.consumer

Enum Class ActiveKeyCountInvalidationReason

java.lang.Object

java.lang.Enum<ActiveKeyCountInvalidationReason>

com.linkedin.davinci.kafka.consumer.ActiveKeyCountInvalidationReason

All Implemented Interfaces:

Serializable, Comparable<ActiveKeyCountInvalidationReason>, Constable

public enum ActiveKeyCountInvalidationReason
extends Enum<ActiveKeyCountInvalidationReason>

Reasons for invalidating a partition's active-key-count tracking. Each value carries a message template (some with a %d placeholder for runtime detail like the offending signal value or header length) that becomes the prefix of the operator-visible ERROR log emitted by StoreIngestionTask.invalidateActiveKeyCount(com.linkedin.davinci.kafka.consumer.PartitionConsumptionState, com.linkedin.davinci.kafka.consumer.ActiveKeyCountInvalidationReason).

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Enum

Enum.EnumDesc<E extends Enum<E>>

Enum Constant Summary

Enum Constants

Enum Constant	Description
CORRUPT_KCS_SIGNAL_VALUE	Follower received a single-byte kcs value outside the {-1, 0, +1} contract.
CORRUPT_MULTI_BYTE_KCS_SIGNAL	Follower received a multi-byte kcs header (corrupt or future producer).
FOLLOWER_DECREMENT_UNDERFLOW	Follower received kcs=-1 but its count was already zero (count drifted).
KEY_EXISTS_FAILURE	Leader's StorageEngine.keyExists(int, byte[]) call (a RocksDB value-column-family lookup used to determine whether a key currently has a live value) threw.
LEADER_DCR_UNDERFLOW	Leader detected an underflow during DCR (count was zero but a delete was processed).
LEADER_PROPAGATED_INVALIDATION	Follower received kcs=0 (leader-propagated invalidation signal).

Method Summary

Modifier and Type	Method	Description
static ActiveKeyCountInvalidationReason	valueOf(String name)	Returns the enum constant of this class with the specified name.
static ActiveKeyCountInvalidationReason[]	values()	Returns an array containing the constants of this enum class, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

FOLLOWER_DECREMENT_UNDERFLOW

public static final ActiveKeyCountInvalidationReason FOLLOWER_DECREMENT_UNDERFLOW

Follower received kcs=-1 but its count was already zero (count drifted).

LEADER_PROPAGATED_INVALIDATION

public static final ActiveKeyCountInvalidationReason LEADER_PROPAGATED_INVALIDATION

Follower received kcs=0 (leader-propagated invalidation signal).

CORRUPT_KCS_SIGNAL_VALUE

public static final ActiveKeyCountInvalidationReason CORRUPT_KCS_SIGNAL_VALUE

Follower received a single-byte kcs value outside the {-1, 0, +1} contract.

CORRUPT_MULTI_BYTE_KCS_SIGNAL

public static final ActiveKeyCountInvalidationReason CORRUPT_MULTI_BYTE_KCS_SIGNAL

Follower received a multi-byte kcs header (corrupt or future producer).

LEADER_DCR_UNDERFLOW

public static final ActiveKeyCountInvalidationReason LEADER_DCR_UNDERFLOW

Leader detected an underflow during DCR (count was zero but a delete was processed).

KEY_EXISTS_FAILURE

public static final ActiveKeyCountInvalidationReason KEY_EXISTS_FAILURE

Leader's StorageEngine.keyExists(int, byte[]) call (a RocksDB value-column-family lookup used to determine whether a key currently has a live value) threw. The transient I/O failure must not stop ingestion or leave the active count in a wrong state — invalidate so we stop publishing a stale value.

Method Details

values

public static ActiveKeyCountInvalidationReason[] values()

Returns an array containing the constants of this enum class, in the order they are declared.

Returns:

an array containing the constants of this enum class, in the order they are declared

valueOf

public static ActiveKeyCountInvalidationReason valueOf(String name)

Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum class has no constant with the specified name

NullPointerException - if the argument is null