sometimes there is no datapoint on grafana dashborad , but when i delete the query and readded . the datapoint comeback , the data souce come from zabbix .
where i check the log , i can see the error message .here:
logger=context userId=1 orgId=1 uname=admin error=“net/http: abort Handler” stack="/usr/local/go/src/runtime/panic.go:513 (0x435098)
gopanic: d.fn = nil
/usr/local/go/src/net/http/httputil/reverseproxy.go:284 (0xabb9a7)
(*ReverseProxy).ServeHTTP: if p.BufferPool != nil {
/go/src/github.com/grafana/grafana/pkg/api/pluginproxy/ds_proxy.go:99 (0xd0ff9c)
/go/src/github.com/grafana/grafana/pkg/api/dataproxy.go:35 (0xfede92)
/go/src/github.com/grafana/grafana/pkg/api/api.go:258 (0x1021953)
/usr/local/go/src/runtime/asm_amd64.s:522 (0x46385a)
call32: DISPATCH(runtime·call1048576, 1048576)
/usr/local/go/src/reflect/value.go:447 (0x4c1223)
Value.call: call(frametype, fn, args, uint32(frametype.size), uint32(retOffset))
/usr/local/go/src/reflect/value.go:308 (0x4c0cb3)
Value.Call: return v.call(“Call”, in)
/go/src/github.com/grafana/grafana/vendor/github.com/go-macaron/inject/inject.go:177 (0x796823)
/go/src/github.com/grafana/grafana/vendor/github.com/go-macaron/inject/inject.go:137 (0x796189)
/go/src/github.com/grafana/grafana/vendor/gopkg.in/macaron.v1/context.go:121 (0x7b2480)
/go/src/github.com/grafana/grafana/vendor/gopkg.in/macaron.v1/context.go:112 (0x7b239e)
/go/src/github.com/grafana/grafana/pkg/middleware/request_tracing.go:25 (0xa4f59c)
/usr/local/go/src/runtime/asm_amd64.s:522 (0x46385a)
call32: DISPATCH(runtime·call1048576, 1048576)
/usr/local/go/src/reflect/value.go:447 (0x4c1223)
Value.call: call(frametype, fn, args, uint32(frametype.size), uint32(retOffset))
/usr/local/go/src/reflect/value.go:308 (0x4c0cb3)
Value.Call: return v.call(“Call”, in)
/go/src/github.com/grafana/grafana/vendor/github.com/go-macaron/inject/inject.go:177 (0x796823)
/go/src/github.com/grafana/grafana/vendor/github.com/go-macaron/inject/inject.go:137 (0x796189)
/go/src/github.com/grafana/grafana/vendor/gopkg.in/macaron.v1/context.go:121 (0x7b2480)
/go/src/github.com/grafana/grafana/vendor/gopkg.in/macaron.v1/context.go:112 (0x7b239e)
/go/src/github.com/grafana/grafana/pkg/middleware/request_metrics.go:17 (0xa4eeb7)
/usr/local/go/src/runtime/asm_amd64.s:522 (0x46385a)
call32: DISPATCH(runtime·call1048576, 1048576)
/usr/local/go/src/reflect/value.go:447 (0x4c1223)
Value.call: call(frametype, fn, args, uint32(frametype.size), uint32(retOffset))
/usr/local/go/src/reflect/value.go:308 (0x4c0cb3)
Value.Call: return v.call(“Call”, in)
/go/src/github.com/grafana/grafana/vendor/github.com/go-macaron/inject/inject.go:177 (0x796823)
/go/src/github.com/grafana/grafana/vendor/github.com/go-macaron/inject/inject.go:137 (0x796189)
/go/src/github.com/grafana/grafana/vendor/gopkg.in/macaron.v1/context.go:121 (0x7b2480)
/go/src/github.com/grafana/grafana/vendor/gopkg.in/macaron.v1/context.go:112 (0x7b239e)
/go/src/github.com/grafana/grafana/pkg/middleware/recovery.go:147 (0xa4edd0)
/go/src/github.com/grafana/grafana/vendor/gopkg.in/macaron.v1/context.go:79 (0x7b2320)
/go/src/github.com/grafana/grafana/vendor/github.com/go-macaron/inject/inject.go:157 (0x796510)
/go/src/github.com/grafana/grafana/vendor/github.com/go-macaron/inject/inject.go:135 (0x79627b)
/go/src/github.com/grafana/grafana/vendor/gopkg.in/macaron.v1/context.go:121 (0x7b2480)
/go/src/github.com/grafana/grafana/vendor/gopkg.in/macaron.v1/context.go:112 (0x7b239e)
/go/src/github.com/grafana/grafana/pkg/middleware/logger.go:34 (0xa4c61d)
/usr/local/go/src/runtime/asm_amd64.s:522 (0x46385a)
call32: DISPATCH(runtime·call1048576, 1048576)
/usr/local/go/src/reflect/value.go:447 (0x4c1223)
Value.call: call(frametype, fn, args, uint32(frametype.size), uint32(retOffset))
/usr/local/go/src/reflect/value.go:308 (0x4c0cb3)
Value.Call: return v.call(“Call”, in)
/go/src/github.com/grafana/grafana/vendor/github.com/go-macaron/inject/inject.go:177 (0x796823)
/go/src/github.com/grafana/grafana/vendor/github.com/go-macaron/inject/inject.go:137 (0x796189)
/go/src/github.com/grafana/grafana/vendor/gopkg.in/macaron.v1/context.go:121 (0x7b2480)
/go/src/github.com/grafana/grafana/vendor/gopkg.in/macaron.v1/router.go:187 (0x7c2c77)
/go/src/github.com/grafana/grafana/vendor/gopkg.in/macaron.v1/router.go:303 (0x7bd3ee)
/go/src/github.com/grafana/grafana/vendor/gopkg.in/macaron.v1/macaron.go:220 (0x7b6941)
/usr/local/go/src/net/http/server.go:2741 (0x6b379a)
serverHandler.ServeHTTP:
/usr/local/go/src/net/http/server.go:1847 (0x6afb35)
(*conn).serve: // to the user without “Connection: close” and
/usr/local/go/src/runtime/asm_amd64.s:1333 (0x465570)
goexit: DATA shifts<>+0x30(SB)/8, $0xffffffffff0f0e0d
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