LOG-9314: Share a single state machine among instances of log stream groups

[jcantrill]

This PR:

• Modifies the detect_exceptions transform to create a single instance of the state machine to share among log streams

Impact :

• Memory savings: Instead of N copies (one per container), there's now 1 shared copy
• Scalability: Memory usage is now O(1) for the state machine instead of O(number of log streams)

ref: https://redhat.atlassian.net/browse/LOG-9314

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jcantrill

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[jcantrill]

cc @vparfonov

[jcantrill]

/hold

[vparfonov]

cargo fmt

[vparfonov]

/test unit

[vparfonov]

/test clo-functional

[vparfonov]

/lgtm

[openshift-ci-robot]

@jcantrill: This pull request references LOG-9314 which is a valid jira issue.

Details

In response to this:

This PR:

• Modifies the detect_exceptions transform to create a single instance of the state machine to share among log streams

Impact :

• Memory savings: Instead of N copies (one per container), there's now 1 shared copy
• Scalability: Memory usage is now O(1) for the state machine instead of O(number of log streams)

ref: https://redhat.atlassian.net/browse/LOG-9314

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[openshift-ci]

New changes are detected. LGTM label has been removed.

[vparfonov]

/test clo-functional

[openshift-ci]

@jcantrill: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/cargo-fmt-check	fe5e7ec	link	false	/test cargo-fmt-check
ci/prow/unit	fe5e7ec	link	true	/test unit

Full PR test history. Your PR dashboard.

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[vparfonov]

/test clo-functional