Go: listen tcp :8080: bind: address already in use

cgo: C compiler gcc not found Go: cgo: C compiler "gcc" not found: exec: "gcc": executable file not found in $PATH Client.Timeout exceeded while awaiting headers Go: net/http: request canceled (Client.Timeout exceeded while awaiting headers) context canceled Go: context canceled (rpc error: code = Canceled desc = context canceled) context deadline exceeded Go: Get "https://api.example.com": context deadline exceeded (Client.Timeout exceeded while awaiting headers) dial tcp: connect: connection refused Go: dial tcp 127.0.0.1:5432: connect: connection refused go: updates to go.mod needed Go: go: updates to go.mod needed; to update it: go mod tidy http: superfluous response.WriteHeader call Go: http: superfluous response.WriteHeader call from main.handler (main.go:25) invalid character looking for beginning of value Go: invalid character '<' looking for beginning of value invalid version: unknown revision Go: go: github.com/foo/bar@v1.2.3: invalid version: unknown revision v1.2.3 iptables: No chain/target/match driver failed programming external connectivity on endpoint: iptables: No chain/target/match by that name json: cannot unmarshal string into Go struct field Go: json: cannot unmarshal string into Go struct field User.age of type int missing go.sum entry Go: missing go.sum entry for module providing package github.com/pkg/errors (imported by app); to add: go get app network not found Error response from daemon: network X not found no Go files in directory Go: package app/cmd: no Go files in /app/cmd / build constraints exclude all Go files no required module provides package Go: no required module provides package github.com/foo/bar; to add it: go get github.com/foo/bar panic: assignment to entry in nil map Go: panic: assignment to entry in nil map panic: close of closed channel Go: panic: close of closed channel (or close of nil channel) panic: send on closed channel Go: panic: send on closed channel panic: sync: negative WaitGroup counter Go: panic: sync: negative WaitGroup counter panic: test timed out after 10m0s Go: panic: test timed out after 10m0s — running tests: TestFoo (10m0s) Pool overlaps Error response from daemon: Pool overlaps with other one on this address space Port 5000/7000 already in use (AirPlay Receiver) macOS: Address already in use — Port 5000 is in use by ControlCenter (AirPlay Receiver) port is already allocated Docker: Bind for 0.0.0.0:80 failed: port is already allocated Puma: Address already in use - bind(2) for 0.0.0.0:3000 (Errno::EADDRINUSE) Rails/Puma: Errno::EADDRINUSE: Address already in use - bind(2) for "0.0.0.0" port 3000 sql: database is closed / driver: bad connection Go: sql: database is closed sql: no rows in result set Go: sql: no rows in result set terminal prompts disabled / 410 Gone (private module) Go: fatal: could not read Username for 'https://github.com': terminal prompts disabled too many open files Go: accept tcp [::]:8080: accept4: too many open files / open x: too many open files verifying module: checksum mismatch / SECURITY ERROR Go: verifying module: checksum mismatch — SECURITY ERROR This download does NOT match an earlier download recorded in go.sum WARNING: DATA RACE Go: WARNING: DATA RACE — Write at 0x00c0000 by goroutine 7: / Previous read at ... by goroutine 6 x509: certificate is valid for X, not Y Go: x509: certificate is valid for www.example.com, not api.example.com x509: certificate signed by unknown authority Go: x509: certificate signed by unknown authority