Build hang occur frequently on linked agent.Is there any way I can check it out?

The aget is spitting only the logs below.
2020-05-25 17:55:34,181 [qtp1564916527-476348] WARN com.pmease.quickbuild.grid.NodeServiceImpl - testGridJob is cancelling job '78495cb3-285c-4897-9244-785eebfdee8d'...
2020-05-25 17:56:04,183 [qtp1564916527-476390] WARN com.pmease.quickbuild.grid.NodeServiceImpl - testGridJob is cancelling job '78495cb3-285c-4897-9244-785eebfdee8d'...
2020-05-25 17:56:34,185 [qtp1564916527-476305] WARN com.pmease.quickbuild.grid.NodeServiceImpl - testGridJob is cancelling job '78495cb3-285c-4897-9244-785eebfdee8d'...
2020-05-25 17:57:04,186 [qtp1564916527-476386] WARN com.pmease.quickbuild.grid.NodeServiceImpl - testGridJob is cancelling job '78495cb3-285c-4897-9244-785eebfdee8d'...
2020-05-25 17:57:35,108 [qtp1564916527-476386] WARN com.pmease.quickbuild.grid.NodeServiceImpl - testGridJob is cancelling job '78495cb3-285c-4897-9244-785eebfdee8d'...
2020-05-25 17:58:05,110 [qtp1564916527-476285] WARN com.pmease.quickbuild.grid.NodeServiceImpl - testGridJob is cancelling job '78495cb3-285c-4897-9244-785eebfdee8d'...
2020-05-25 17:58:35,111 [qtp1564916527-476361] WARN com.pmease.quickbuild.grid.NodeServiceImpl - testGridJob is cancelling job '78495cb3-285c-4897-9244-785eebfdee8d'...
2020-05-25 17:59:05,113 [qtp1564916527-476390] WARN com.pmease.quickbuild.grid.NodeServiceImpl - testGridJob is cancelling job '78495cb3-285c-4897-9244-785eebfdee8d'...