lordgarrish commented on code in PR #13339:
URL: https://github.com/apache/ignite/pull/13339#discussion_r4076059587
##########
docs/_docs/key-value-api/transactions.adoc:
##########
@@ -358,43 +357,23 @@ TcpDiscoveryNode [id=<id>, addrs=[<address>], order=1,
ver=2.18.0#YYYYMMDD-sha1:
Tx: [xid=<id>, label=null, state=ACTIVE, startTime=YYYY-MM-DD
15:15:16.852, duration=3 sec, isolation=REPEATABLE_READ,
concurrency=PESSIMISTIC, topVer=AffinityTopologyVersion [topVer=3,
minorTopVer=2], timeout=0 sec, size=100, dhtNodes=[<id>, <id>], nearXid=<id>,
parentNodeIds=[<id>]]
Command [TX] finished with code: 0
----
-. Extract the `xid` from all transactions across all nodes and remove
duplicate `xid` values. Duplicates occur because the same transaction can exist
on multiple nodes — in this case, its `xid` will appear in the command output
multiple times.
-. For each `xid`, run the `tx kill` command to roll back that transaction.
Example call: `control.sh --tx --xid <id> --kill`.
-
-* Second termination stage (optional) — restarting nodes that block
transaction completion. Check if the first stage was sufficient to handle LRT:
-. After completing the first stage, wait for a period equal to the configured
transaction timeout.
-. Run the `control.sh --tx --min-duration <transaction_timeout>` command.
-If the list is empty, all LRTs have been successfully canceled, and the LRT
impact should be resolved.
-If the list is not empty, the command output will contain information about
nodes and the transactions running on them:
-+
+To cancel the transactions, whose execution time takes longer than expected,
use the `control.sh --tx --min-duration <transaction_duration_seconds> --kill`
command. For example, to cancel the transactions that have been running for
more than 100 seconds, execute the following command:
+[source, shell]
----
-Command [TX] started
-Arguments: --tx
---------------------------------------------------------------------------------
-Matching transactions:
-TcpDiscoveryNode [id=<id>, addrs=[<address>], order=1,
ver=2.18.0#YYYYMMDD-sha1:00000000, isClient=false,
consistentId=gridCommandHandlerTest0]
- Tx: [xid=<id>, label=null, state=ACTIVE, startTime=YYYY-MM-DD
16:58:45.348, duration=3 sec, isolation=REPEATABLE_READ,
concurrency=PESSIMISTIC, topVer=AffinityTopologyVersion [topVer=3,
minorTopVer=2], timeout=0 sec, size=100, dhtNodes=[<id>, <id>], nearXid=<id>,
parentNodeIds=[<id>]]
- Tx: [xid=<id>, label=label1, state=ACTIVE, startTime=YYYY-MM-DD
16:58:48.451, duration=0 sec, isolation=READ_COMMITTED,
concurrency=PESSIMISTIC, topVer=AffinityTopologyVersion [topVer=3,
minorTopVer=2], timeout=2147483 sec, size=111, dhtNodes=[<id>, <id>],
nearXid=<id>, parentNodeIds=[<id>]]
-TcpDiscoveryNode [id=<id>, addrs=[<address>], order=2,
ver=2.18.0#YYYYMMDD-sha1:00000000, isClient=false,
consistentId=gridCommandHandlerTest1]
- Tx: [xid=<id>, label=null, state=ACTIVE, startTime=YYYY-MM-DD
16:58:45.348, duration=3 sec, isolation=REPEATABLE_READ,
concurrency=PESSIMISTIC, topVer=AffinityTopologyVersion [topVer=3,
minorTopVer=2], timeout=0 sec, size=1, dhtNodes=[<id>], nearXid=<id>,
parentNodeIds=[<id>]]
-TcpDiscoveryNode [id=<id>, addrs=[<address>], order=3,
ver=2.18.0#YYYYMMDD-sha1:00000000, isClient=true, consistentId=client]
- Tx: [xid=<id>, label=label2, state=PREPARING, startTime=YYYY-MM-DD
16:58:45.348, duration=3 sec, isolation=READ_COMMITTED, concurrency=OPTIMISTIC,
topVer=AffinityTopologyVersion [topVer=3, minorTopVer=2], timeout=0 sec,
size=11, dhtNodes=[<id>, <id>], nearXid=<id>, parentNodeIds=[<id>]]
-Command [TX] finished with code: 0
+control.sh --tx --min-duration 100 --kill
----
-. For each transaction, extract the value of the `dhtNodes` field.
-. For each ID in `dhtNodes`, obtain detailed node information using the
`control.sh --system-view NODES` command.
-. In the command output, find the node whose `nodeId` starts with the string
from `dhtNodes`.
-. Restart this node to unblock the transaction.
== Causes of LRT
* High system load, which leads to slower transaction processing. Indicators:
** log messages about the start of page eviction for in-memory data regions or
page replacement for persistent data regions;
** growth of queues in the striped pool;
** increased checkpoint duration for clusters with persistence enabled;
+** high cpu or disk utilization;
+** increased latency of cache operation;
** long GC pauses.
* Unstable network operation. Indicators: log messages about connection loss
between nodes, socket closures, or network timeouts triggering.
-* Resource-intensive operations (for example, deleting a cache that is part of
a cache group). Indicators: queue growth on individual threads of the system
pool and striped pool, while other threads and overall node utilization may
remain low.
-* Internal Apache Ignite bugs that can lead to deadlocks. Indicators: thread
dumps (`thread dump`) show threads waiting to acquire a read lock (`readLock`)
or write lock (`writeLock`) during checkpoint creation; over time, the thread
state does not change (stack trace remains unchanged).
+* Resource-intensive operations (for example, deleting a cache that is part of
a cache group, snapshots execution, index rebuild, rebalancing, etc.).
+* Deadlocks during transactions execution.
Review Comment:
Thanks for the notice, fixed.
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