Hola!
I have a problem recovering from cluster crash in case when persistence is
enabled.
Our setup is
- 5 VM nodes with 40G Ram and 200GB disk,
- persistence is enabled (on separate disk on each VM),
- all cluster actions are made through Ansible playbooks,
- all caches are either partitioned with backups = 1 or replicated,
- cluster starts as the service with running ignite.sh,
- baseline auto adjust is disabled.
Also following the docs about partition loss policy I have added
-DIGNITE_WAIT_FOR_BACKUPS_ON_SHUTDOWN=true to JVM_OPTS to wait until partition
rebalancing.
What problem we have: after shutting down several nodes (2 go 5) one after
another exception about lost partitions is raised.
Caused by:
org.apache.ignite.internal.processors.cache.CacheInvalidStateException: Failed
to execute query because cache partition has been lostPart
[cacheName=PUBLIC_StoreProductFeatures, part=512]
But in logs of dead nodes I see that all shutdown hooks are called as expected
on both nodes:
[2022-11-22T09:24:19,614][INFO ][shutdown-hook][G] Invoking shutdown hook...
[2022-11-22T09:24:19,615][INFO ][shutdown-hook][G] Ensuring that caches have
sufficient backups and local rebalance completion...
And baseline topology looks like this (with 2 offline nodes as expected):
Cluster state: active
Current topology version: 23
Baseline auto adjustment disabled: softTimeout=30000
Current topology version: 23 (Coordinator:
ConsistentId=1c6bad01-d187-40fa-ae9b-74023d080a8b, Address=172.17.0.1, Order=3)
Baseline nodes:
ConsistentId=1c6bad01-d187-40fa-ae9b-74023d080a8b, Address=172.17.0.1,
State=ONLINE, Order=3
ConsistentId=4f67fccb-211b-4514-916b-a6286d1bb71b, Address=172.17.0.1,
State=ONLINE, Order=21
ConsistentId=d980fa1c-e955-428a-bac9-d67dbfebb75e, Address=172.17.0.1,
State=ONLINE, Order=5
ConsistentId=f151bd52-c173-45d7-952d-45cbe1d5fe97, State=OFFLINE
ConsistentId=f6862354-b175-4a0c-a94c-20253a944996, State=OFFLINE
--------------------------------------------------------------------------------
Number of baseline nodes: 5
Other nodes not found.
So my questions are:
1) What can I do to recover from partitions lost problem after shutting down
several nodes? I thought that in case of graceful shutdown this problem must be
solved.
Now I can recover by returning one of offline nodes to cluster (starting the
service) and running reset_lost_partitions command for broken cache. After this
cache becomes available.
2) What can I do to prevent this problem in scenario with automatic cluster
deployment? Should I add reset_lost_partitions command after activation or
redeploy?
Please help.
Thanks in advance!
Best regards,
Rose.
--
Роза Айсина
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