Service 'query' exited with status 134. Restarting

I got the following error from time to time. About 5 times a day.
I’m running
Community Edition 5.0.0 build 3519

Service ‘query’ exited with status 134. Restarting. Messages:
/home/couchbase/.cbdepscache/exploded/x86_64/go-1.8.1/go/src/net/fd_poll_runtime.go:80 +0x34 fp=0xc4203ce6a0 sp=0xc4203ce670
net.(*netFD).Read(0xc42086a310, 0xc420f408d1, 0x1, 0x1, 0x0, 0x1693340, 0x1689670)
/home/couchbase/.cbdepscache/exploded/x86_64/go-1.8.1/go/src/net/fd_unix.go:250 +0x1b7 fp=0xc4203ce708 sp=0xc4203ce6a0
net.(*conn).Read(0xc4207a5b18, 0xc420f408d1, 0x1, 0x1, 0x0, 0x0, 0x0)
/home/couchbase/.cbdepscache/exploded/x86_64/go-1.8.1/go/src/net/net.go:181 +0x70 fp=0xc4203ce778 sp=0xc4203ce708
net/http.(*connReader).backgroundRead(0xc420f408c0)
/home/couchbase/.cbdepscache/exploded/x86_64/go-1.8.1/go/src/net/http/server.go:656 +0x58 fp=0xc4203ce7d8 sp=0xc4203ce778
runtime.goexit()
/home/couchbase/.cbdepscache/exploded/x86_64/go-1.8.1/go/src/runtime/asm_amd64.s:2197 +0x1 fp=0xc4203ce7e0 sp=0xc4203ce7d8
created by net/http.(*connReader).startBackgroundRead
/home/couchbase/.cbdepscache/exploded/x86_64/go-1.8.1/go/src/net/http/server.go:652 +0xdf
[goport(/opt/couchbase/bin/cbq-engine)] 2018/02/09 08:12:18 child process exited with status 134

Did you see any other errors on query.log . It looks like you are running out of memory.