Please find the log below.
Starting elasticsearch ...
2018-10-07T04:40:44.286+0000: Total time for which application threads were stopped: 0.0001605 seconds, Stopping threads took: 0.0000563 seconds
[2018-10-07T04:40:46,837][INFO ][o.e.n.Node ] [lmm-elasticsearch-ingest-0] initializing ...
2018-10-07T04:40:46.883+0000: Total time for which application threads were stopped: 0.0004247 seconds, Stopping threads took: 0.0000745 seconds
[2018-10-07T04:40:46,895][INFO ][o.e.e.NodeEnvironment ] [lmm-elasticsearch-ingest-0] using [1] data paths, mounts [[/var/data/elasticsearch (/dev/xvda1)]], net usable_space [12.4gb], net total_space [79.9gb], types [xfs]
[2018-10-07T04:40:46,896][INFO ][o.e.e.NodeEnvironment ] [lmm-elasticsearch-ingest-0] heap size [11.3gb], compressed ordinary object pointers [true]
[2018-10-07T04:40:46,897][INFO ][o.e.n.Node ] [lmm-elasticsearch-ingest-0] node name [lmm-elasticsearch-ingest-0], node ID [f73VJ63NQruVRhMMdAPTmQ]
[2018-10-07T04:40:46,897][INFO ][o.e.n.Node ] [lmm-elasticsearch-ingest-0] version[6.2.2], pid[38], build[10b1edd/2018-02-16T19:01:30.685723Z], OS[Linux/3.10.0-693.17.1.el7.x86_64/amd64], JVM[Oracle Corporation/OpenJDK 64-Bit Server VM/1.8.0_161/25.161-b14]
[2018-10-07T04:40:46,897][INFO ][o.e.n.Node ] [lmm-elasticsearch-ingest-0] JVM arguments [-Xms12g, -Xmx12g, -XX:+UseConcMarkSweepGC, -XX:CMSInitiatingOccupancyFraction=75, -XX:+UseCMSInitiatingOccupancyOnly, -XX:MaxNewSize=7g, -XX:+AlwaysPreTouch, -Xss1m, -Djava.awt.headless=true, -Dfile.encoding=UTF-8, -Djna.nosys=true, -XX:-OmitStackTraceInFastThrow, -Dio.netty.noUnsafe=true, -Dio.netty.noKeySetOptimization=true, -Dio.netty.recycler.maxCapacityPerThread=0, -Dlog4j.shutdownHookEnabled=false, -Dlog4j2.disable.jmx=true, -Djava.io.tmpdir=/tmp/elasticsearch.UxIymGYo, -XX:+HeapDumpOnOutOfMemoryError, -XX:+PrintGCDetails, -XX:+PrintGCDateStamps, -XX:+PrintTenuringDistribution, -XX:+PrintGCApplicationStoppedTime, -XX:+UseGCLogFileRotation, -XX:NumberOfGCLogFiles=32, -XX:GCLogFileSize=64m, -Des.path.home=/usr/share/elasticsearch, -Des.path.conf=/usr/share/elasticsearch/config]
2018-10-07T04:40:48.268+0000: Total time for which application threads were stopped: 0.0004576 seconds, Stopping threads took: 0.0001058 seconds
2018-10-07T04:40:50.198+0000: Total time for which application threads were stopped: 0.0003106 seconds, Stopping threads took: 0.0000783 seconds
2018-10-07T04:40:50.198+0000: [GC (CMS Initial Mark) To enable GC log rotation, use -Xloggc: -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=<num_of_files>
where num_of_file > 0
GC log rotation is turned off
[1 CMS-initial-mark: 0K(5242880K)] 1644223K(11848960K), 0.1590150 secs] [Times: user=0.32 sys=0.00, real=0.16 secs]
2018-10-07T04:40:50.357+0000: Total time for which application threads were stopped: 0.1592459 seconds, Stopping threads took: 0.0000894 seconds
2018-10-07T04:40:50.357+0000: [CMS-concurrent-mark-start]
2018-10-07T04:40:50.359+0000: [CMS-concurrent-mark: 0.001/0.001 secs] [Times: user=0.01 sys=0.00, real=0.00 secs]
2018-10-07T04:40:50.359+0000: [CMS-concurrent-preclean-start]
2018-10-07T04:40:50.365+0000: [CMS-concurrent-preclean: 0.006/0.006 secs] [Times: user=0.03 sys=0.00, real=0.01 secs]
2018-10-07T04:40:50.365+0000: [CMS-concurrent-abortable-preclean-start]
2018-10-07T04:40:55.358+0000: Total time for which application threads were stopped: 0.0004360 seconds, Stopping threads took: 0.0000803 seconds
CMS: abort preclean due to time 2018-10-07T04:40:55.431+0000: [CMS-concurrent-abortable-preclean: 1.670/5.066 secs] [Times: user=10.01 sys=0.11, real=5.06 secs]
2018-10-07T04:40:55.432+0000: Total time for which application threads were stopped: 0.0006131 seconds, Stopping threads took: 0.0000574 seconds
2018-10-07T04:40:55.433+0000: [GC (CMS Final Remark) [YG occupancy: 2113994 K (6606080 K)]2018-10-07T04:40:55.433+0000: [Rescan (parallel) , 1.0069157 secs]2018-10-07T04:40:56.439+0000: [weak refs processing, 0.0001541 secs]2018-10-07T04:40:56.440+0000: [class unloading, 0.0054691 secs]2018-10-07T04:40:56.445+0000: [scrub symbol table, 0.0058738 secs]2018-10-07T04:40:56.451+0000: [scrub string table, 0.0006907 secs][1 CMS-remark: 0K(5242880K)] 2113994K(11848960K), 1.0209028 secs] [Times: user=2.04 sys=0.01, real=1.03 secs]
2018-10-07T04:40:56.453+0000: Total time for which application threads were stopped: 1.0212395 seconds, Stopping threads took: 0.0002442 seconds
2018-10-07T04:40:56.457+0000: [CMS-concurrent-sweep-start]
2018-10-07T04:40:56.457+0000: [CMS-concurrent-sweep: 0.000/0.000 secs] [Times: user=0.00 sys=0.00, real=0.00 secs]
2018-10-07T04:40:56.457+0000: [CMS-concurrent-reset-start]