# How to emit console.log output when using javascript-lang for custom scripts? **URL:** \ **Category:** Elasticsearch\ **Created:** [December 23, 2014, 6:43pm UTC](https://discuss.elastic.co/t/how-to-emit-console-log-output-when-using-javascript-lang-for-custom-scripts/21374 "2014-12-23T18:43:17Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Tim\_Heckel](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/tim_heckel/32/1039_2.png) [@Tim\_Heckel](https://discuss.elastic.co/u/Tim_Heckel)\ **Post date:** [December 23, 2014, 6:43pm UTC](https://discuss.elastic.co/t/how-to-emit-console-log-output-when-using-javascript-lang-for-custom-scripts/21374/1 "2014-12-23T18:43:17Z")
Hi all -- I'd like to emit to stdout information within my custom .js script (located in /elasticsearch/1.4.2/config/scripts/test.js). I've tried both console.log and print (just a guess), but neither work: "error": "ElasticsearchIllegalArgumentException[failed to execute script]; nested: EcmaError[ReferenceError: "console" is not defined. (Script2.js#19)]; " "error": "ElasticsearchIllegalArgumentException[failed to execute script]; nested: EcmaError[ReferenceError: "print" is not defined. (Script1.js#19)]; " Any way for me to hook into stdout to emit logging information this way? Thanks very much. Tim -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/ea610adb-986c-4de2-a429-6fb03b45a640%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/ea610adb-986c-4de2-a429-6fb03b45a640%40googlegroups.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![vineeth\_mohan\_2](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/vineeth_mohan_2/32/747_2.png) [@vineeth\_mohan\_2](https://discuss.elastic.co/u/vineeth_mohan_2)\ **Post date:** [January 16, 2015, 10:23am UTC](https://discuss.elastic.co/t/how-to-emit-console-log-output-when-using-javascript-lang-for-custom-scripts/21374/2 "2015-01-16T10:23:36Z")
Hello Tim , Its very much possible from groovy , by accessing the Elasticsearch logger instance. You should be able to do something similar for javascript too. Some good folks from Elasticsearch has given a good documentation on it against my issue. _import org.elasticsearch.common.logging._; \* \*ESLogger logger=ESLoggerFactory.getLogger('myscript'); \* \*logger.info [http://logger.info](http://logger.info)('This is a log message'); \* LINK - [Expose logger object in the scripts · Issue #9068 · elastic/elasticsearch · GitHub](https://github.com/elasticsearch/elasticsearch/issues/9068) Thanks Vineeth Mohan, Elasticsearch consultant, [qbox.io](http://qbox.io) ( Elasticsearch service provider [https://qbox.io/](https://qbox.io/)) On Wed, Dec 24, 2014 at 12:13 AM, Tim Heckel [timheckel@gmail.com](mailto:timheckel@gmail.com) wrote: > Hi all -- I'd like to emit to stdout information within my custom .js > script (located in /elasticsearch/1.4.2/config/scripts/test.js). > > I've tried both console.log and print (just a guess), but neither work: > > "error": "ElasticsearchIllegalArgumentException[failed to execute script]; > nested: EcmaError[ReferenceError: "console" is not defined. > (Script2.js#19)]; " > "error": "ElasticsearchIllegalArgumentException[failed to execute script]; > nested: EcmaError[ReferenceError: "print" is not defined. > (Script1.js#19)]; " > > Any way for me to hook into stdout to emit logging information this way? > Thanks very much. > > Tim > > -- > You received this message because you are subscribed to the Google Groups > "elasticsearch" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). > To view this discussion on the web visit > [https://groups.google.com/d/msgid/elasticsearch/ea610adb-986c-4de2-a429-6fb03b45a640%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/ea610adb-986c-4de2-a429-6fb03b45a640%40googlegroups.com) > [https://groups.google.com/d/msgid/elasticsearch/ea610adb-986c-4de2-a429-6fb03b45a640%40googlegroups.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/ea610adb-986c-4de2-a429-6fb03b45a640%40googlegroups.com?utm_medium=email&utm_source=footer) > . > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/CAGdPd5mbn3ZRGpCk2Ey3bnJ-JQMXyW\_J8ObGHnL8ef3N7CG\_7Q%40mail.gmail.com](https://groups.google.com/d/msgid/elasticsearch/CAGdPd5mbn3ZRGpCk2Ey3bnJ-JQMXyW_J8ObGHnL8ef3N7CG_7Q%40mail.gmail.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 6, 2017, 12:38am UTC](https://discuss.elastic.co/t/how-to-emit-console-log-output-when-using-javascript-lang-for-custom-scripts/21374/3 "2017-07-06T00:38:26Z")