Andrey Aleksandrov created IGNITE-8676:
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Summary: Possible data loss after stoping/starting several nodes
at the same time
Key: IGNITE-8676
URL: https://issues.apache.org/jira/browse/IGNITE-8676
Project: Ignite
Issue Type: Bug
Components: persistence
Affects Versions: 2.4
Reporter: Andrey Aleksandrov
Fix For: 2.6
Attachments: DataLossTest.zip, image-2018-06-01-12-34-54-320.png,
image-2018-06-01-13-12-47-218.png, image-2018-06-01-13-15-17-437.png
Steps to reproduce:
1)Start 3 data (DN1, DN2, DN3) nodes with the configuration that contains the
cache with node filter for only these three nodes and 1 backup. (see
configuration from attachment)
2)Activate the cluster. Now you should have 3 nodes in BLT
3)Start new server node (SN). Now you should have 3 nodes in BLT and 1 node not
in the baseline.
4)Using some node load about 10000 (or more) entities into the cache.
5)Start visor and check that number of primary partitions equals to backup
partitions.
!image-2018-06-01-12-34-54-320.png!
6)Now stop DN3 and SN. After that start them at the same time.
7)When DN3 and SN will be online, check that number of primary partitions (PN)
equals to backup partitions (BN).
7.1)In a case if PN == BN => go to step 6)
7.2)In a case if PN != BN => go to step 8)
!image-2018-06-01-13-12-47-218.png!
8)Deactivate the cluster with control.sh.
9)Activate the cluster with control.sh.
Not you should see the data loss.
!image-2018-06-01-13-15-17-437.png!
Notes:
1)Stops/Starts should be done at the same time
2)Consistent Ids for nodes should be constant.
Not you should see the data loss.
Also, I provide the reproducer that often possible to reproduce this issue (not
always). Free the working directory and restart reproducer in case if there is
no data loss in this iteration.
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