[
https://issues.apache.org/jira/browse/CASSANDRA-20209?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17913858#comment-17913858
]
Stefan Miklosovic commented on CASSANDRA-20209:
-----------------------------------------------
[CASSANDRA-20209|https://github.com/instaclustr/cassandra/tree/CASSANDRA-20209]
{noformat}
java17_pre-commit_tests
✓ j17_build 5m 18s
✓ j17_cqlsh_dtests_py311 6m 49s
✓ j17_cqlsh_dtests_py311_vnode 7m 19s
✓ j17_cqlsh_dtests_py38 7m 15s
✓ j17_cqlsh_dtests_py38_vnode 8m 7s
✓ j17_cqlshlib_cython_tests 11m 23s
✓ j17_cqlshlib_tests 8m 17s
✓ j17_unit_tests 15m 31s
✓ j17_unit_tests_repeat 6m 12s
✓ j17_utests_latest 14m 55s
✓ j17_utests_latest_repeat 5m 33s
✓ j17_utests_oa 16m 2s
✓ j17_utests_oa_repeat 6m 1s
✕ j17_dtests 37m 18s
compaction_test.TestCompaction test_compaction_throughput
refresh_test.TestRefresh test_refresh_deadlock_startup
✕ j17_dtests_latest 40m 47s
read_repair_test.TestSpeculativeReadRepair test_failed_read_repair
read_repair_test.TestSpeculativeReadRepair test_speculative_write
✕ j17_dtests_vnode 40m 28s
compaction_test.TestCompaction test_compaction_throughput
✕ j17_jvm_dtests 26m 3s
org.apache.cassandra.distributed.test.ReadSpeculationTest speculateTest
org.apache.cassandra.fuzz.harry.integration.model.ConcurrentQuiescentCheckerIntegrationTest
testConcurrentReadWriteWorkload
✕ j17_jvm_dtests_latest_vnode 24m 32s
org.apache.cassandra.distributed.test.jmx.JMXFeatureTest
testOneNetworkInterfaceProvisioning
{noformat}
[java17_pre-commit_tests|https://app.circleci.com/pipelines/github/instaclustr/cassandra/5208/workflows/b0317fbe-5ab9-4f0b-97e3-47c6b8352aa5]
> Two snapshot manifests on same table against same SSTables do not have always
> same size
> ---------------------------------------------------------------------------------------
>
> Key: CASSANDRA-20209
> URL: https://issues.apache.org/jira/browse/CASSANDRA-20209
> Project: Apache Cassandra
> Issue Type: Bug
> Components: Local/Snapshots
> Reporter: Stefan Miklosovic
> Assignee: Stefan Miklosovic
> Priority: Normal
> Fix For: 5.x
>
>
> I noticed that two manifests can have different sizes when snapshot is
> created on same SSTables. This might be hit in practice in tests when I
> measure that two snapshots have same sizes on disk.
> The difference is caused by manifest.json, check these two:
> {code}
> {
> "files" : [ "oa-1-big-Data.db" ],
> "created_at" : "2025-01-15T13:26:45.04Z",
> "expires_at" : null,
> "ephemeral" : false
> }
> {code}
> {code}
> {
> "files" : [ "oa-1-big-Data.db" ],
> "created_at" : "2025-01-15T13:27:45.012Z",
> "expires_at" : null,
> "ephemeral" : false
> }
> {code}
> The difference is in "created_at". One manifest has two decimals for
> milliseconds (04) and another one three (012).
> The difference is one digit, which will make the whole file bigger, hence
> their sizes do not match, hence the sizes of the snapshots as such do not
> match.
> This causes errors when e.g. running multiplex tests in CI. If test happens
> to generate two manifests with three places for milliseconds (or two) in both
> cases, then it will just pass but every now and then, it doesn't.
> The solution is to modify JsonUtils and persuade JSON_OBJECT_MAPPER to
> serialize Instant's always with 3 decimal places.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
