Elasticsearch indexer: undefined method `zero?' for nil:NilClass
https://sentry.gitlap.com/gitlab/gitlabcom/issues/8593/
NoMethodError: undefined method `zero?' for nil:NilClass
lib/gitlab/elastic/indexer.rb:33:in `run'
raise Error, output unless status.zero?
app/services/git_push_service.rb:82:in `index_commits_blobs'
indexer.run(
lib/gitlab/metrics/instrumentation.rb:152:in `block in index_commits_blobs'
trans.measure_method(#{label.inspect}) { super }
lib/gitlab/metrics/method_call.rb:23:in `measure'
retval = yield
lib/gitlab/metrics/transaction.rb:71:in `measure_method'
@methods[name].measure(&block)
...
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