# Panic when using json overwrite\_keys option and elasticsearch output

**URL:** <https://discuss.elastic.co/t/panic-when-using-json-overwrite-keys-option-and-elasticsearch-output/47168>\
**Category:** Beats\
**Tags:** filebeat\
**Created:** [April 12, 2016, 7:57pm UTC](https://discuss.elastic.co/t/panic-when-using-json-overwrite-keys-option-and-elasticsearch-output/47168 "2016-04-12T19:57:23Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![jeffearl](https://avatars.discourse-cdn.com/v4/letter/j/aeb1de/32.png) [@jeffearl](https://discuss.elastic.co/u/jeffearl)\
**Post date:** [April 12, 2016, 7:57pm UTC](https://discuss.elastic.co/t/panic-when-using-json-overwrite-keys-option-and-elasticsearch-output/47168/1 "2016-04-12T19:57:23Z")

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I'm testing the new json support in filebeat 5.0.0-alpha1. I'm having an issue sending json output to elasticsearch with the overwrite\_keys option. If overwrite\_keys is enabled, the filebeat process crashes. Debug output indicates "panic: interface conversion: interface is string, not common.Time". The source timestamp in my test log entry is "2016-04-05T18:47:18.444Z", which seems to be in the proper format. Both logstash and local file outputs work as expected under the same conditions with the same log. If I disable overwrite\_keys, logs are properly sent to elasticsearch. I'm testing on Centos 6.7 64-bit.

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**Author:** ![andrewkroh](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/andrewkroh/32/3784_2.png) [@andrewkroh](https://discuss.elastic.co/u/andrewkroh)\
**Post date:** [April 12, 2016, 8:19pm UTC](https://discuss.elastic.co/t/panic-when-using-json-overwrite-keys-option-and-elasticsearch-output/47168/2 "2016-04-12T20:19:04Z")

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Thanks for reporting, please open a [new issue](https://github.com/elastic/beats/issues/new) for this and attach a stack trace if you have one.

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 5, 2017, 9:53pm UTC](https://discuss.elastic.co/t/panic-when-using-json-overwrite-keys-option-and-elasticsearch-output/47168/3 "2017-07-05T21:53:22Z")

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