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[BUG] [CI] Investigate Flaky test failure for windows CI tasks #3021

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DarshitChanpura opened this issue Jul 17, 2023 · 22 comments
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[BUG] [CI] Investigate Flaky test failure for windows CI tasks #3021

DarshitChanpura opened this issue Jul 17, 2023 · 22 comments
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bug Something isn't working flaky-test Flaky Test issue triaged Issues labeled as 'Triaged' have been reviewed and are deemed actionable.

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@DarshitChanpura
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DarshitChanpura commented Jul 17, 2023

What is the bug?

Windows CI has been flaky with recent runs for tasks, specifically citest, dlicRestApiTest.

See these runs for example:

https://github.com/opensearch-project/security/actions/runs/5577190458/attempts/1 <-- 3 tasks failed
https://github.com/opensearch-project/security/actions/runs/5577190458/attempts/2 <-- 2 tasks failed (1 prev failed task passed)
https://github.com/opensearch-project/security/actions/runs/5577190458/attempts/3 <-- 1 task failed
https://github.com/opensearch-project/security/actions/runs/5577190458/attempts/5 <-- all tasks passed

Failure Details
(citest, windows-latest, 11) (citest, windows-latest, 17)
1st run - org.opensearch.security.SecurityAdminTests.testSecurityAdmin
- org.opensearch.security.auditlog.compliance.RestApiComplianceAuditlogTest.testRestApiRolesEnabled
- org.opensearch.security.auditlog.compliance.ComplianceAuditlogTest.testComplianceEnable
- org.opensearch.security.auditlog.compliance.RestApiComplianceAuditlogTest.testRestApiRolesDisabled
- org.opensearch.security.multitenancy.test.MultitenancyTests.testTenantParametersSubstitution
- org.opensearch.security.auditlog.integration.BasicAuditlogTest.testDeleteByQuery
- org.opensearch.security.httpclient.HttpClientTest.testPlainConnection
- org.opensearch.security.auditlog.compliance.ComplianceAuditlogTest.testComplianceEnable
- org.opensearch.security.auditlog.compliance.RestApiComplianceAuditlogTest.testRestApiRolesEnabled
- com.amazon.dlic.auth.http.saml.HTTPSamlAuthenticatorTest.initialConnectionFailureTest
- com.amazon.dlic.auth.ldap2.LdapBackendIntegTest2.testIntegLdapAuthenticationSSL
- org.opensearch.security.SecurityAdminTests.testIsLegacySecurityIndexOnV7Index
- org.opensearch.security.auditlog.compliance.ComplianceAuditlogTest.testInternalConfig
- org.opensearch.security.auditlog.compliance.ComplianceAuditlogTest.testComplianceEnable
- org.opensearch.security.auditlog.compliance.ComplianceAuditlogTest.testInternalConfig
- org.opensearch.security.auditlog.compliance.RestApiComplianceAuditlogTest.testBCryptHashRedaction
- org.opensearch.security.auditlog.compliance.RestApiComplianceAuditlogTest.testRestApiRolesDisabled
- org.opensearch.security.multitenancy.test.TenancyPrivateTenantEnabledTests.testPrivateTenantDisabled_Update_EndToEnd
- org.opensearch.security.auditlog.integration.BasicAuditlogTest.testSensitiveMethodRedaction
- org.opensearch.security.auditlog.integration.BasicAuditlogTest.testScroll
- org.opensearch.security.auditlog.integration.BasicAuditlogTest.testScroll
- org.opensearch.security.auditlog.compliance.RestApiComplianceAuditlogTest.testBCryptHashRedaction
2nd run - org.opensearch.security.SecurityAdminTests.testSecurityAdminRegularUpdate
- org.opensearch.security.auditlog.compliance.ComplianceAuditlogTest.testInternalConfig
- org.opensearch.security.auditlog.integration.BasicAuditlogTest.testDeleteByQuery
- org.opensearch.security.multitenancy.test.TenancyMultitenancyEnabledTests.testMultitenancyDisabled_endToEndTest
- org.opensearch.security.auditlog.compliance.ComplianceAuditlogTest.testInternalConfig
- org.opensearch.security.auditlog.integration.BasicAuditlogTest.testDeleteByQuery
- com.amazon.dlic.auth.ldap2.LdapBackendIntegTest2.testAttributesWithImpersonation
- org.opensearch.security.auditlog.compliance.ComplianceAuditlogTest.testWriteHistory
- org.opensearch.security.auditlog.compliance.RestApiComplianceAuditlogTest.testBCryptHashRedaction
- org.opensearch.security.multitenancy.test.MultitenancyTests.testTenantParametersSubstitution
- org.opensearch.security.multitenancy.test.MultitenancyTests.testMt
- org.opensearch.security.multitenancy.test.MultitenancyTests.testMtMulti
- org.opensearch.security.auditlog.compliance.RestApiComplianceAuditlogTest.testBCryptHashRedaction
3rd run - org.opensearch.security.SecurityAdminTests.testSecurityAdmin
- org.opensearch.security.SecurityAdminTests.testSecurityAdminInvalidCert
- org.opensearch.security.auditlog.compliance.RestApiComplianceAuditlogTest.testRestApiRolesEnabled
- org.opensearch.security.auditlog.compliance.RestApiComplianceAuditlogTest.testRestApiNewUser
- org.opensearch.security.auditlog.compliance.ComplianceAuditlogTest.testUpdate
- org.opensearch.security.auditlog.compliance.ComplianceAuditlogTest.testInternalConfig
- org.opensearch.security.auditlog.compliance.RestApiComplianceAuditlogTest.testRestApiRolesEnabled
- org.opensearch.security.auditlog.integration.BasicAuditlogTest.testDeleteByQuery
- org.opensearch.security.multitenancy.test.MultitenancyTests.testMt
- org.opensearch.security.auditlog.integration.BasicAuditlogTest.testDeleteByQuery
- org.opensearch.security.multitenancy.test.TenancyMultitenancyEnabledTests.testMultitenancyDisabled_endToEndTest
- org.opensearch.security.auditlog.compliance.RestApiComplianceAuditlogTest.testRestApiNewUser
- org.opensearch.security.auditlog.compliance.ComplianceAuditlogTest.testInternalConfig
- org.opensearch.security.auditlog.compliance.ComplianceAuditlogTest.testUpdate
Test Methods with failures across all mentioned runs
- org.opensearch.security.SecurityAdminTests.testSecurityAdmin
- org.opensearch.security.auditlog.compliance.RestApiComplianceAuditlogTest.testRestApiRolesEnabled
- org.opensearch.security.auditlog.compliance.ComplianceAuditlogTest.testComplianceEnable
- org.opensearch.security.auditlog.compliance.RestApiComplianceAuditlogTest.testRestApiRolesDisabled
- org.opensearch.security.multitenancy.test.MultitenancyTests.testTenantParametersSubstitution
- org.opensearch.security.auditlog.integration.BasicAuditlogTest.testDeleteByQuery
- org.opensearch.security.httpclient.HttpClientTest.testPlainConnection
- com.amazon.dlic.auth.http.saml.HTTPSamlAuthenticatorTest.initialConnectionFailureTest
- com.amazon.dlic.auth.ldap2.LdapBackendIntegTest2.testIntegLdapAuthenticationSSL
- org.opensearch.security.SecurityAdminTests.testIsLegacySecurityIndexOnV7Index
- org.opensearch.security.auditlog.compliance.ComplianceAuditlogTest.testInternalConfig
- org.opensearch.security.auditlog.compliance.RestApiComplianceAuditlogTest.testBCryptHashRedaction
- org.opensearch.security.multitenancy.test.TenancyPrivateTenantEnabledTests.testPrivateTenantDisabled_Update_EndToEnd
- org.opensearch.security.auditlog.integration.BasicAuditlogTest.testSensitiveMethodRedaction
- org.opensearch.security.auditlog.integration.BasicAuditlogTest.testScroll
- org.opensearch.security.auditlog.compliance.RestApiComplianceAuditlogTest.testBCryptHashRedaction
- org.opensearch.security.multitenancy.test.MultitenancyTests.testMt
- org.opensearch.security.multitenancy.test.MultitenancyTests.testMtMulti
- org.opensearch.security.auditlog.compliance.RestApiComplianceAuditlogTest.testWriteHistory
- org.opensearch.security.auditlog.compliance.RestApiComplianceAuditlogTest.testRestApiNewUser
- org.opensearch.security.auditlog.compliance.ComplianceAuditlogTest.testUpdate
- org.opensearch.security.SecurityAdminTests.testSecurityAdminInvalidCert
- org.opensearch.security.multitenancy.test.TenancyMultitenancyEnabledTests.testMultitenancyDisabled_endToEndTest

What is the expected behavior?
No flakiness.

@DarshitChanpura DarshitChanpura added bug Something isn't working untriaged Require the attention of the repository maintainers and may need to be prioritized labels Jul 17, 2023
@davidlago davidlago added the flaky-test Flaky Test issue label Jul 17, 2023
@peternied peternied removed the untriaged Require the attention of the repository maintainers and may need to be prioritized label Jul 17, 2023
@peternied
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[Triage] Thanks for filing, could we get a list of tests that are impacted?

@cwperks
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cwperks commented Jul 19, 2023

@DarshitChanpura it looks like there were a few fixes put into main for windows support that may not have been backported to 2.x.

Particularly this one: #2180

There is a list of issues that @peternied added to this PR description: #2291 - it may be best to backport the one's of those that can be backported

@peternied
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From #3032 (review)

CI / test (citest, windows-latest, 11) (pull_request) Failing after 29m

Tests with failures:
 - org.opensearch.security.auditlog.compliance.ComplianceAuditlogTest.testInternalConfig
 - org.opensearch.security.auditlog.compliance.ComplianceAuditlogTest.testComplianceEnable
 - org.opensearch.security.auditlog.compliance.ComplianceAuditlogTest.testUpdate
 - org.opensearch.security.auditlog.compliance.RestApiComplianceAuditlogTest.testRestApiNewUser
 - org.opensearch.security.auditlog.compliance.ComplianceAuditlogTest.testInternalConfig
 - org.opensearch.security.auditlog.compliance.RestApiComplianceAuditlogTest.testAutoInit
 - org.opensearch.security.multitenancy.test.TenancyMultitenancyEnabledTests.testMultitenancyDisabled_endToEndTest
 - org.opensearch.security.auditlog.compliance.ComplianceAuditlogTest.testUpdate
 - org.opensearch.security.auditlog.compliance.RestApiComplianceAuditlogTest.testAutoInit
 - org.opensearch.security.auditlog.compliance.ComplianceAuditlogTest.testComplianceEnable

@DarshitChanpura
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[Triage] Thanks for filing, could we get a list of tests that are impacted?

Updated the issue description to include two sections: 1. Run Details. 2. Test Methods with failure

@DarshitChanpura
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Seems like there were no failures in #3032 and #3037 after #3035 was merged which suggests this issue might have been fixed.

@cwperks
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cwperks commented Jul 21, 2023

I've seen these failures in a couple of places now:

Tests with failures:
 - org.opensearch.security.SecurityAdminTests.testSecurityAdmin
 - org.opensearch.security.auditlog.compliance.ComplianceAuditlogTest.testInternalConfig
 - org.opensearch.security.auditlog.compliance.RestApiComplianceAuditlogTest.testRestApiNewUser
 - org.opensearch.security.auditlog.compliance.RestApiComplianceAuditlogTest.testBCryptHashRedaction
 - org.opensearch.security.auditlog.compliance.ComplianceAuditlogTest.testInternalConfig
 - org.opensearch.security.multitenancy.test.MultitenancyTests.testMultitenancyAnonymousUser
 - org.opensearch.security.multitenancy.test.MultitenancyTests.testMt
 - org.opensearch.security.auditlog.integration.BasicAuditlogTest.testScroll
 - org.opensearch.security.auditlog.integration.BasicAuditlogTest.testScroll
 - org.opensearch.security.httpclient.HttpClientTest.testSslConnectionPKIAuth
 - org.opensearch.security.multitenancy.test.TenancyMultitenancyEnabledTests.testMultitenancyDisabled_endToEndTest
 - org.opensearch.security.auditlog.compliance.RestApiComplianceAuditlogTest.testBCryptHashRedaction

When trying a single test suite locally like this:

./gradlew -x opensslCITest test --tests ComplianceAuditlogTest -i

I see that it fails in blocks like this and I can see the following error in the logs:

    [2023-07-21T17:52:31,538][WARN ][rest.suppressed] path: /humanresources/_doc/100, params: {pretty=, index=humanresources, id=100}
    org.opensearch.OpenSearchSecurityException: No user found for indices:admin/mapping/auto_put
        at org.opensearch.security.filter.SecurityFilter.apply0(SecurityFilter.java:356) ~[main/:?]
        at org.opensearch.security.filter.SecurityFilter.apply(SecurityFilter.java:165) ~[main/:?]
        at org.opensearch.action.support.TransportAction$RequestFilterChain.proceed(TransportAction.java:216) ~[opensearch-2.10.0-SNAPSHOT.jar:2.10.0-SNAPSHOT]
        at org.opensearch.action.support.TransportAction.execute(TransportAction.java:188) ~[opensearch-2.10.0-SNAPSHOT.jar:2.10.0-SNAPSHOT]
        at org.opensearch.action.support.TransportAction.execute(TransportAction.java:107) ~[opensearch-2.10.0-SNAPSHOT.jar:2.10.0-SNAPSHOT]
        at org.opensearch.client.node.NodeClient.executeLocally(NodeClient.java:110) ~[opensearch-2.10.0-SNAPSHOT.jar:2.10.0-SNAPSHOT]
        at org.opensearch.client.node.NodeClient.doExecute(NodeClient.java:97) ~[opensearch-2.10.0-SNAPSHOT.jar:2.10.0-SNAPSHOT]
        at org.opensearch.client.support.AbstractClient.execute(AbstractClient.java:476) ~[opensearch-2.10.0-SNAPSHOT.jar:2.10.0-SNAPSHOT]
        at org.opensearch.client.support.AbstractClient$IndicesAdmin.execute(AbstractClient.java:1537) ~[opensearch-2.10.0-SNAPSHOT.jar:2.10.0-SNAPSHOT]
        at org.opensearch.cluster.action.index.MappingUpdatedAction.sendUpdateMapping(MappingUpdatedAction.java:161) ~[opensearch-2.10.0-SNAPSHOT.jar:2.10.0-SNAPSHOT]
        at org.opensearch.cluster.action.index.MappingUpdatedAction.updateMappingOnClusterManager(MappingUpdatedAction.java:126) ~[opensearch-2.10.0-SNAPSHOT.jar:2.10.0-SNAPSHOT]
        at org.opensearch.action.bulk.TransportShardBulkAction.lambda$dispatchedShardOperationOnPrimary$1(TransportShardBulkAction.java:415) ~[opensearch-2.10.0-SNAPSHOT.jar:2.10.0-SNAPSHOT]
        at org.opensearch.action.bulk.TransportShardBulkAction.executeBulkItemRequest(TransportShardBulkAction.java:646) ~[opensearch-2.10.0-SNAPSHOT.jar:2.10.0-SNAPSHOT]
        at org.opensearch.action.bulk.TransportShardBulkAction$2.doRun(TransportShardBulkAction.java:467) ~[opensearch-2.10.0-SNAPSHOT.jar:2.10.0-SNAPSHOT]
        at org.opensearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:52) ~[opensearch-2.10.0-SNAPSHOT.jar:2.10.0-SNAPSHOT]
        at org.opensearch.action.bulk.TransportShardBulkAction.performOnPrimary(TransportShardBulkAction.java:531) ~[opensearch-2.10.0-SNAPSHOT.jar:2.10.0-SNAPSHOT]
        at org.opensearch.action.bulk.TransportShardBulkAction.dispatchedShardOperationOnPrimary(TransportShardBulkAction.java:412) ~[opensearch-2.10.0-SNAPSHOT.jar:2.10.0-SNAPSHOT]
        at org.opensearch.action.bulk.TransportShardBulkAction.dispatchedShardOperationOnPrimary(TransportShardBulkAction.java:124) ~[opensearch-2.10.0-SNAPSHOT.jar:2.10.0-SNAPSHOT]
        at org.opensearch.action.support.replication.TransportWriteAction$1.doRun(TransportWriteAction.java:223) ~[opensearch-2.10.0-SNAPSHOT.jar:2.10.0-SNAPSHOT]
        at org.opensearch.common.util.concurrent.ThreadContext$ContextPreservingAbstractRunnable.doRun(ThreadContext.java:908) ~[opensearch-2.10.0-SNAPSHOT.jar:2.10.0-SNAPSHOT]
        at org.opensearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:52) ~[opensearch-2.10.0-SNAPSHOT.jar:2.10.0-SNAPSHOT]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[?:?]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[?:?]

which I had seen before when testing out this PR: #2765

I created a branch to revert that change in 2.x locally to check if it would help with CI stability (https://github.com/cwperks/security/tree/check-2.x-build) and the tests did pass after the first try.

Its puzzling why that error is platform specific according to CI.

@cwperks
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cwperks commented Jul 24, 2023

I think #2765 may need to be reverted. After seeing the error on both main and 2.x on Friday I did more sanity testing on the RC build to try to produce the error outside of CI, but I was not able to.

To see examples of the error you can check a recent build on main and look for

org.opensearch.OpenSearchSecurityException: No user found for indices:admin/mapping/auto_put

or another on 2.x here

From what I have put together the issue is reproducible on many of the ComplianceAuditlogTest like this one.

and fails when writing the first document to the humanresources where under the hood its doing a PutMappingRequest (indices:admin/mapping/auto_put). I believe that this request does a BulkShardRequest (indices:data/write/bulk[s]) which spawns a BulkShardRequest[Primary] (indices:data/write/bulk[s][p]) and BulkShardRequest[Replica]
(indices:data/write/bulk[s][r])

The error is coming up during the derivative BulkShardRequest[Primary] and BulkShardRequest[Replica] requests.

After tracing through the code it looks like the assumption that the transient headers will still be available on the receiving end of a transport request on a local node may not be accurate. From doing some testing, it looks like direct requests still go through the same OutboundHandler and InboundHandler as transport requests.

Flow in the OutboundHandler

  1. In an OutboundHandler the threadContext is sent as headers in the OutboundMessage
  2. The threadcontext is serialized here
  3. and in the ThreadContext it looks like only the request headers (not the transient headers) are written to the OutputStream: https://github.com/opensearch-project/OpenSearch/blob/main/server/src/main/java/org/opensearch/common/util/concurrent/ThreadContext.java#L812-L831

Flow in the InboundHandler

  1. It gets the headers from the InboundMessage
  2. It stashes the local threadcontext and puts the headers from the InboundMessage

I'm having some trouble tracing all of the calls, but it looks like more work may need to be done to skip the serialization-deserialization of the transient headers on local node calls.

I'm still doing testing on the RC to see if the issue is reproducible there.

@DarshitChanpura
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CI passed on #2765's merge to main (without any retries) so I don't believe that is the root cause. However, the failures seem oddly specific to requests involving action: indices:admin/mapping/auto_put (See this run for example)

All failures point to this source:

[{"type":"security_exception","reason":"No user found for indices:admin/mapping/auto_put"}],"type":"security_exception","reason":"No user found for indices:admin/mapping/auto_put"},"status":500

@stephen-crawford
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[Triage] This is being actively looked at by @DarshitChanpura.

@stephen-crawford stephen-crawford added the triaged Issues labeled as 'Triaged' have been reviewed and are deemed actionable. label Jul 24, 2023
@DarshitChanpura
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DarshitChanpura commented Jul 24, 2023

There are 3 mains areas of concern that were identified:

and in the ThreadContext it looks like only the request headers (not the transient headers) are written to the OutputStream:

@cwperks From what I see in OutboundMessage class, the transient headers are being written to output stream: https://github.com/opensearch-project/OpenSearch/blob/3ee42920fa886bdf566f1bb7b1666ffa72d36f54/server/src/main/java/org/opensearch/common/util/concurrent/ThreadContext.java#L321-L325

@reta
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reta commented Jul 25, 2023

@DarshitChanpura do you need a hand with figuring out the cause?

@DarshitChanpura
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@DarshitChanpura do you need a hand with figuring out the cause?

Yes, please.

@cwperks
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cwperks commented Jul 25, 2023

In my local testing, the sender (SecurityInterceptor) and the receiver (SecurityRequestHandler) are using different threadpools even when handling a local node request. I don't think persistent threadcontext headers would help here if there are different threadpools.

A concept of a ThreadContextStatePropagator was added recently. This may help transmit the necessary transient headers on a local node.

@reta
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reta commented Jul 25, 2023

I don't think persistent threadcontext headers would help here if there are different threadpools.

We've been looking with @DarshitChanpura and the hypothesis here (not confirmed yet) is that the thread context may not work here: the SecurityInterceptor thread may finish before the SecurityRequestHandler (basically the SecurityRequestHandler won't see the stashed thread context but the previous one)

@cwperks
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cwperks commented Jul 25, 2023

One thing that's interesting, is that I see that sometimes it bypasses the sender during local requests and the logic to bypass is actually in core.

  1. In TransportService, sendRequest first calls on getConnection
  2. getConnection returns a localConnection if its the local node
  3. The localNodeConnection calls sendLocalRequest which does not call on the AsyncSender at all. Requests to other nodes use the async sender

In the failing tests the AsyncSender is called somehow (on a local node request) which always precedes the failures seen in CI.

@cwperks
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cwperks commented Jul 25, 2023

In doing more local testing, I think I see an identity crisis happening where core thinks the local node is node1 and the security plugin thinks its node2. I'm looking into how this can happen now. Both the security plugin and core should be aware of node they are running on without any conflicts.

I added logging statements in TransportService.getConnection and then again inside SecurityInterceptor.sendRequestDecorate which is called directly after getConnection on remote node requests to determine that there was a discrepancy between what core thought the localNode was and what the security plugin thought the localNode was.

@reta
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reta commented Jul 25, 2023

I think I nailed it folks:

    public static DiscoveryNode getLocalNode() {
        return localNode;
    }

We run 3 nodes in single JVM, with 3 security plugins, only one of them wins. @DarshitChanpura I think at this moment - this is 100% test related problem that should not leak into production.

@DarshitChanpura
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DarshitChanpura commented Jul 25, 2023

This localNode is set by using clusterService.localNode() method upon node bootstrap:
https://github.com/opensearch-project/OpenSearch/blob/main/server/src/main/java/org/opensearch/node/Node.java#L1379

And security plugin uses this localNode reference to then compare if request is for sameNode:

final DiscoveryNode localNode = OpenSearchSecurityPlugin.getLocalNode();
boolean isSameNodeRequest = localNode != null && localNode.equals(connection.getNode());

i'm not super-convinced on what would happen in a multi-node cluster when the request ends up in the same node. Will the thread always be shared between SecurityInterceptor and SecurityRequestHandler in that case?

@cwperks
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cwperks commented Jul 25, 2023

We run 3 nodes in single JVM, with 3 security plugins, only one of them wins. @DarshitChanpura I think at this moment - this is 100% test related problem that should not leak into production.

I think so too, I was not able to replicate the issue on the RC.

That being said I think the code path here in the SecurityInterceptor and the corresponding code in the receiver is dead code. In reality, the user is not serialized on local node requests because it takes the bypass route described here

@DarshitChanpura
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I will update here with an RCA and next steps soon.

@davidlago
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Closing this one as the major blocker was resolved. Future flaky tests can have their own issues.

@DarshitChanpura
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I will update here with an RCA and next steps soon.

Posted results here: #2724 (comment)

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