Bitnami solr-5.1.0-0 version throws 502 proxy error , indexes not getting rebuilt

While Indexing showing below errors
Wed Jul 19 13:37:41.216500 2017] [proxy_http:error] [pid 12108:tid 1168] (OS 10060)A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond. : [client 10.1.64.114:55076] AH01102: error reading status line from remote server 127.0.0.1:8983
[Wed Jul 19 13:37:41.216500 2017] [proxy:error] [pid 12108:tid 1168] [client 10.1.64.114:55076] AH00898: Error reading from remote server returned by /solr/bslamc_prod/update
[Wed Jul 19 15:30:24.195926 2017] [proxy_http:error] [pid 12108:tid 1164] (OS 10060)A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond. : [client 10.160.101.95:53617] AH01102: error reading status line from remote server 127.0.0.1:8983, referer: http://bmftclscpdbs08/solr/
[Wed Jul 19 15:30:24.195926 2017] [proxy:error] [pid 12108:tid 1164] [client 10.160.101.95:53617] AH00898: Error reading from remote server returned by /solr/bslamc_prod/update, referer: http://bmftclscpdbs08/solr/
[Wed Jul 19 15:30:28.899180 2017] [proxy_http:error] [pid 12108:tid 1072] (OS 10060)A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond. : [client 10.1.64.117:65414] AH01102: error reading status line from remote server 127.0.0.1:8983
[Wed Jul 19 15:30:28.899180 2017] [proxy:error] [pid 12108:tid 1072] [client 10.1.64.117:65414] AH00898: Error reading from remote server returned by /solr/bslamc_prod/update