WildFly 37 Model Reference

NAKACK2

Runtime only resource This resource is runtime only and doesn't have any persistent configuration.

Attributes (49)

after_creation_hook Fully qualified name of a class implementing ProtocolHook, will be called after creation of the protocol (before init())

Attribute	Value
Type	STRING
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

avg_batch_size The average number of messages in a batch removed from the table and delivered to the application

Attribute	Value
Type	STRING
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

become_server_queue_size Size of the queue to hold messages received after creating the channel, but before being connected (is_server=false). After becoming the server, the messages in the queue are fed into up() and the queue is cleared. The motivation is to avoid retransmissions (see https://issues.redhat.com/browse/JGRP-1509 for details).

Attribute	Value
Type	INT
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

become_server_queue_size_actual Actual size of the become_server_queue

Attribute	Value
Type	INT
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

current_seqno

Attribute	Value
Type	LONG
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

discard_delivered_msgs Should messages delivered to application be discarded

Attribute	Value
Type	BOOLEAN
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

ergonomics Enables ergonomics: dynamically find the best values for properties at runtime

Attribute	Value
Type	BOOLEAN
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

id Give the protocol a different ID if needed so we can have multiple instances of it in the same stack

Attribute	Value
Type	INT
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

is_trace tracing is enabled or disabled for the given log

Attribute	Value
Type	BOOLEAN
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

level logger level (see javadocs)

Attribute	Value
Type	STRING
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

local_addr The local address of this member

Attribute	Value
Type	STRING
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

log_discard_msgs discards warnings about promiscuous traffic

Attribute	Value
Type	BOOLEAN
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

log_not_found_msgs If false, trashes warnings about retransmission messages not found in the xmit_table (used for testing)

Attribute	Value
Type	BOOLEAN
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

max_batch_size The max size of a message batch when delivering messages. 0 is unbounded

Attribute	Value
Type	INT
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

max_xmit_req_size Max number of messages to ask for in a retransmit request. 0 disables this and uses the max bundle size in the transport

Attribute	Value
Type	INT
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

non_member_messages Number of messages from non-members

Attribute	Value
Type	INT
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

num_messages_received Number of messages received

Attribute	Value
Type	INT
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

num_messages_sent Number of messages sent

Attribute	Value
Type	INT
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

policies The list of policies

Attribute	Value
Type	STRING
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

resend_last_seqno If enabled, multicasts the highest sent seqno every xmit_interval ms. This is skipped if a regular message has been multicast, and the task aquiesces if the highest sent seqno hasn't changed for resend_last_seqno_max_times times. Used to speed up retransmission of dropped last messages (JGRP-1904)

Attribute	Value
Type	BOOLEAN
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

resend_last_seqno_max_times Max number of times the last seqno is resent before acquiescing if last seqno isn't incremented

Attribute	Value
Type	INT
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

resend_task_running Whether or not the task to resend the last seqno is running (depends on resend_last_seqno)

Attribute	Value
Type	BOOLEAN
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

reuse_message_batches Reuses the same message batch for delivery of regular messages (only done by a single thread anyway). Not advisable for buffers that can grow infinitely (NAKACK3)

Attribute	Value
Type	BOOLEAN
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

sends_can_block True if sending a message can block at the transport level

Attribute	Value
Type	BOOLEAN
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

size_of_all_messages Returns the number of bytes of all messages in all retransmit buffers. To compute the size, Message.getLength() is used

Attribute	Value
Type	LONG
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

size_of_all_messages_incl_headers Returns the number of bytes of all messages in all retransmit buffers. To compute the size, Message.size() is used

Attribute	Value
Type	LONG
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

stats Determines whether to collect statistics (and expose them via JMX). Default is true

Attribute	Value
Type	BOOLEAN
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

suppress_time_non_member_warnings Time during which identical warnings about messages from a non member will be suppressed. 0 disables this (every warning will be logged). Setting the log level to ERROR also disables this.

Attribute	Value
Type	LONG
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

use_mcast_xmit Retransmit retransmit responses (messages) using multicast rather than unicast

Attribute	Value
Type	BOOLEAN
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

use_mcast_xmit_req Use a multicast to request retransmission of missing messages

Attribute	Value
Type	BOOLEAN
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

xmit_from_random_member Ask a random member for retransmission of a missing message

Attribute	Value
Type	BOOLEAN
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

xmit_interval Interval (in milliseconds) at which missing messages (from all retransmit buffers) are retransmitted

Attribute	Value
Type	LONG
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

xmit_reqs_received Number of retransmit requests received

Attribute	Value
Type	STRING
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

xmit_reqs_sent Number of retransmit requests sent

Attribute	Value
Type	STRING
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

xmit_rsps_received Number of retransmit responses received (only when use_macst_xmit=false)

Attribute	Value
Type	STRING
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

xmit_rsps_sent Number of retransmit responses sent

Attribute	Value
Type	STRING
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

xmit_table_capacity Capacity of the retransmit buffer. Computed as xmit_table_num_rows * xmit_table_msgs_per_row

Attribute	Value
Type	LONG
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

xmit_table_max_compaction_time Number of milliseconds after which the matrix in the retransmission table is compacted (only for experts)

Attribute	Value
Type	LONG
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

xmit_table_missing_messages Total number of missing (= not received) messages in all retransmit buffers

Attribute	Value
Type	INT
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

xmit_table_msgs_per_row Number of elements of a row of the matrix in the retransmission table; gets rounded to the next power of 2 (only for experts). The capacity of the matrix is xmit_table_num_rows * xmit_table_msgs_per_row

Attribute	Value
Type	INT
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

xmit_table_num_compactions Number of retransmit table compactions

Attribute	Value
Type	INT
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

xmit_table_num_current_rows Prints the number of rows currently allocated in the matrix. This value will not be lower than xmit_table_now_rows

Attribute	Value
Type	INT
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

xmit_table_num_moves Number of retransmit table moves

Attribute	Value
Type	INT
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

xmit_table_num_purges Number of retransmit table purges

Attribute	Value
Type	INT
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

xmit_table_num_resizes Number of retransmit table resizes

Attribute	Value
Type	INT
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

xmit_table_num_rows Number of rows of the matrix in the retransmission table (only for experts)

Attribute	Value
Type	INT
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

xmit_table_resize_factor Resize factor of the matrix in the retransmission table (only for experts)

Attribute	Value
Type	DOUBLE
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

xmit_table_undelivered_msgs Total number of undelivered messages in all retransmit buffers

Attribute	Value
Type	INT
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default

xmit_task_running Is the retransmit task running

Attribute	Value
Type	BOOLEAN
Nillable	true
Expressions Allowed	false
Storage	runtime
Access Type	read-only
Stability	default