fluent / fluent-plugin-opensearch / 35311016559

93%

main: 93%

Pull #195

github

out_opensearch: guard the cached client with one mutex

Before:
the credential refresh timer used its own mutex and the flush
thread error path used none, so both could clear @_os while another
thread was building a client under @client_mutex. A failed credential
refresh also threw away the cached client for nothing.

After:
both paths take @client_mutex, and the timer keeps the old
credentials when it cannot get new ones.

Co-Authored-By: Claude <noreply@anthropic.com>
Signed-off-by: Kentaro Hayashi <hayashi@clear-code.com>

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