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Fix incorrect statement split, use more relaxed JSON encoder #10

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merged 1 commit into from
Jul 31, 2019

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smira
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@smira smira commented Jul 30, 2019

log.fatal statement was split incorrectly into lines, so that part of
the message is actually not logged.

Use 'yajl' instead of default JSON encoder, due to the following problem
observed:

2019-07-29 19:47:09 +0000 [warn]: #0 failed to flush the buffer. retry_time=0 next_retry_seconds=2019-07-29 19:47:10 +0000 chunk="58e09d319b82a042ddc2fef0edb883b1" error_class=Encoding::UndefinedConversionError error="\"\\xE2\" from ASCII-8BIT to UTF-8"
  2019-07-29 19:47:09 +0000 [warn]: #0 /usr/lib/ruby/gems/2.5.0/gems/fluent-plugin-azure-loganalytics-0.3.1/lib/fluent/plugin/out_azure-loganalytics.rb:101:in `encode'
  2019-07-29 19:47:09 +0000 [warn]: #0 /usr/lib/ruby/gems/2.5.0/gems/fluent-plugin-azure-loganalytics-0.3.1/lib/fluent/plugin/out_azure-loganalytics.rb:101:in `to_json'
  2019-07-29 19:47:09 +0000 [warn]: #0 /usr/lib/ruby/gems/2.5.0/gems/fluent-plugin-azure-loganalytics-0.3.1/lib/fluent/plugin/out_azure-loganalytics.rb:101:in `rescue in write'
  2019-07-29 19:47:09 +0000 [warn]: #0 /usr/lib/ruby/gems/2.5.0/gems/fluent-plugin-azure-loganalytics-0.3.1/lib/fluent/plugin/out_azure-loganalytics.rb:93:in `write'
  2019-07-29 19:47:09 +0000 [warn]: #0 /usr/lib/ruby/gems/2.5.0/gems/fluentd-1.4.2/lib/fluent/plugin/output.rb:1125:in `try_flush'
  2019-07-29 19:47:09 +0000 [warn]: #0 /usr/lib/ruby/gems/2.5.0/gems/fluentd-1.4.2/lib/fluent/plugin/output.rb:1425:in `flush_thread_run'
  2019-07-29 19:47:09 +0000 [warn]: #0 /usr/lib/ruby/gems/2.5.0/gems/fluentd-1.4.2/lib/fluent/plugin/output.rb:454:in `block (2 levels) in start'
  2019-07-29 19:47:09 +0000 [warn]: #0 /usr/lib/ruby/gems/2.5.0/gems/fluentd-1.4.2/lib/fluent/plugin_helper/thread.rb:78:in `block in thread_create'

`log.fatal` statement was split incorrectly into lines, so that part of
the message is actually not logged.

Use 'yajl' instead of default JSON encoder, due to the following problem
observed:

```
2019-07-29 19:47:09 +0000 [warn]: #0 failed to flush the buffer. retry_time=0 next_retry_seconds=2019-07-29 19:47:10 +0000 chunk="58e09d319b82a042ddc2fef0edb883b1" error_class=Encoding::UndefinedConversionError error="\"\\xE2\" from ASCII-8BIT to UTF-8"
  2019-07-29 19:47:09 +0000 [warn]: #0 /usr/lib/ruby/gems/2.5.0/gems/fluent-plugin-azure-loganalytics-0.3.1/lib/fluent/plugin/out_azure-loganalytics.rb:101:in `encode'
  2019-07-29 19:47:09 +0000 [warn]: #0 /usr/lib/ruby/gems/2.5.0/gems/fluent-plugin-azure-loganalytics-0.3.1/lib/fluent/plugin/out_azure-loganalytics.rb:101:in `to_json'
  2019-07-29 19:47:09 +0000 [warn]: #0 /usr/lib/ruby/gems/2.5.0/gems/fluent-plugin-azure-loganalytics-0.3.1/lib/fluent/plugin/out_azure-loganalytics.rb:101:in `rescue in write'
  2019-07-29 19:47:09 +0000 [warn]: #0 /usr/lib/ruby/gems/2.5.0/gems/fluent-plugin-azure-loganalytics-0.3.1/lib/fluent/plugin/out_azure-loganalytics.rb:93:in `write'
  2019-07-29 19:47:09 +0000 [warn]: #0 /usr/lib/ruby/gems/2.5.0/gems/fluentd-1.4.2/lib/fluent/plugin/output.rb:1125:in `try_flush'
  2019-07-29 19:47:09 +0000 [warn]: #0 /usr/lib/ruby/gems/2.5.0/gems/fluentd-1.4.2/lib/fluent/plugin/output.rb:1425:in `flush_thread_run'
  2019-07-29 19:47:09 +0000 [warn]: #0 /usr/lib/ruby/gems/2.5.0/gems/fluentd-1.4.2/lib/fluent/plugin/output.rb:454:in `block (2 levels) in start'
  2019-07-29 19:47:09 +0000 [warn]: #0 /usr/lib/ruby/gems/2.5.0/gems/fluentd-1.4.2/lib/fluent/plugin_helper/thread.rb:78:in `block in thread_create'
```
@yokawasa yokawasa self-requested a review July 31, 2019 00:17
@yokawasa yokawasa self-assigned this Jul 31, 2019
@yokawasa yokawasa added the bug label Jul 31, 2019
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LGTM

@yokawasa
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@smira Thank you so much for the PR. I confirmed it worked perfect!

@yokawasa yokawasa closed this Jul 31, 2019
@yokawasa yokawasa reopened this Jul 31, 2019
@yokawasa yokawasa merged commit f61cb7e into yokawasa:master Jul 31, 2019
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smira commented Jul 31, 2019

thanks, that was really fast!

I don't know what is the best fix, but I think there is issue with this log line if records is big enough - it might eat a lot of memory while formatting the message. Not sure what the best fix might be here, probably just cut to some reasonable amount of messages, like 32kb?

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