IMHO "size 1k" in configuration is causing log rotation if they grow above specified size just before daily rotate.

I don't see "delaycompress" enabled as well - this might mean, that ALL files must be compressed. So it doesn't match "gravity-es-prod02.log.2015-12-01".

All above needs testing to verify if my thoughts are right.

I found an error in your provided script (missing endscript):

postrotate
    rm -rf /var/log/elasticsearch/*.log.$(date +%Y)*
endscript

I believe this part fails and somehow applies global settings for this log pattern.

IMHO "size 1k" in configuration is causing log rotation if they grow specified size just before daily.

I don't see "delaycompress" enabled as well - this might mean, that ALL files must be compressed. So it doesn't match "gravity-es-prod02.log.2015-12-01".

All above needs testing to verify if my thoughts are right.

IMHO "size 1k" in configuration is causing log rotation if they grow above specified size just before daily rotate.

I don't see "delaycompress" enabled as well - this might mean, that ALL files must be compressed. So it doesn't match "gravity-es-prod02.log.2015-12-01".

All above needs testing to verify if my thoughts are right.