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depends on undefined service service "web" depends on undefined service "db": invalid compose project

Docker · layer 6, Platform & cloud

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1 · On your device 2 · Network 4 · Application & API 5 · Data 6 · Platform & cloud 7 · Build & delivery
depends on undefined service — service "web" depends on undefined service "db": invalid compose project (Docker)depends on …unknown field — strict decoding error: unknown field "spec.template.spec.containers[0].ports[0].protocl" (Kubernetes)unknown fielddocker-compose: command not found — docker-compose: command not found / 'compose' is not a docker command (Docker)docker-compose: com…compose validation — docker compose: services.x Additional property y is not allowed / yaml: line N: mapping values are not allowed (Docker)compose validationPool overlaps — Error response from daemon: Pool overlaps with other one on this address space (Docker)Pool overlapsunhealthy — Docker container is unhealthy (health check failing) (Docker)unhealthythe attribute version is obsolete — WARN: the attribute `version` is obsolete, it will be ignored (Docker)the attribute versi…network not found — Error response from daemon: network X not found (Docker)network not found422 — HTTP 422 Unprocessable Content (HTTP)4221406 — MySQL ERROR 1406: Data too long for column (MySQL)1406NumberFormatException — java.lang.NumberFormatException: For input string: "x" (Java)NumberFormatExcepti…not a git repository — fatal: not a git repository (or any of the parent directories): .git (Git)not a git repositorycommand not found — bash: command not found (Linux)command not foundJAVA_HOME not set — ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. (Java)JAVA_HOME not setIndentationError — IndentationError: unexpected indent / expected an indented block (Python)IndentationErrorCOPY failed — COPY failed: file not found in build context / "/app/x": not found (Docker)COPY failederror converting YAML to JSON — error converting YAML to JSON: yaml: line 12: did not find expected key (Kubernetes)error converting YA…iptables: No chain/target/match — driver failed programming external connectivity on endpoint: iptables: No chain/target/match by that name (Docker)iptables: No chain/…NetworkOnMainThreadException — android.os.NetworkOnMainThreadException (Android)NetworkOnMainThread…actively refused it — HttpRequestException: No connection could be made because the target machine actively refused it (localhost:5001) (.NET)actively refused itConflict container name — Conflict. The container name "/x" is already in use by container … (Docker)Conflict container …Health checks failed — ALB target unhealthy: Health checks failed with these codes: [404] / Request timed out (AWS)Health checks failedExited (0) — Docker container exits immediately (Exited (0) / Exited (1) right after start) (Docker)Exited (0)DEP0005 — DeprecationWarning: Buffer() is deprecated due to security and usability issues (DEP0005) (Node.js)DEP0005DEP0040 — DeprecationWarning: The `punycode` module is deprecated (DEP0040) (Node.js)DEP0040npm WARN deprecated — npm WARN deprecated package@1.2.3: This package is no longer supported. (npm)npm WARN deprecatedprovided port is not in the valid range — spec.ports[0].nodePort: Invalid value: 80: provided port is not in the valid range. The range of valid ports is 30000-32767 (Kubernetes)provided port is no…NSURLErrorDomain Code=-1009 — Error Domain=NSURLErrorDomain Code=-1009 "The Internet connection appears to be offline." (iOS)NSURLErrorDomain Co…NSURLErrorDomain Code=-1001 — Error Domain=NSURLErrorDomain Code=-1001 "The request timed out." (iOS)NSURLErrorDomain Co…

Directly related (7)

unknown fieldKubernetes

strict decoding error: unknown field "spec.template.spec.containers[0].ports[0].protocl"

The manifest contains a field the API schema doesn’t know — a typo, wrong indentation, or a field from another API version.

docker-compose: command not foundDocker

docker-compose: command not found / 'compose' is not a docker command

Your system has only one of the two Compose flavours: the old docker-compose (v1) binary or the newer docker compose (v2) plugin.

compose validationDocker

docker compose: services.x Additional property y is not allowed / yaml: line N: mapping values are not allowed

The compose file is invalid YAML or uses a key Compose doesn’t recognise at that level (usually an indentation mistake).

Pool overlapsDocker

Error response from daemon: Pool overlaps with other one on this address space

Docker tried to create a network whose subnet clashes with an existing Docker network (or a VPN/host route).

unhealthyDocker

Docker container is unhealthy (health check failing)

The container is running, but its HEALTHCHECK command keeps failing, so Docker (and dependent services) consider it unhealthy.

the attribute version is obsoleteDocker

WARN: the attribute `version` is obsolete, it will be ignored

A harmless Compose v2 warning: the top-level version: line in docker-compose.yml is no longer used.

network not foundDocker

Error response from daemon: network X not found

The container or Compose project refers to a Docker network that doesn’t exist (any more).

Two steps away (21)

422HTTP

HTTP 422 Unprocessable Content

The request is well-formed, but the data fails validation (e.g. invalid email, missing required field).

1406MySQL

MySQL ERROR 1406: Data too long for column

The value is longer than the column allows (e.g. 300 characters into VARCHAR(255)), and strict mode rejects it instead of truncat…

NumberFormatExceptionJava

java.lang.NumberFormatException: For input string: "x"

A string couldn’t be parsed as a number — it’s empty, has spaces/commas, is too large, or isn’t numeric.

not a git repositoryGit

fatal: not a git repository (or any of the parent directories): .git

You ran a Git command outside a Git working tree.

command not foundLinux

bash: command not found

The shell can’t find an executable with that name in any directory on your PATH.

JAVA_HOME not setJava

ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.

Build tools (Gradle, Maven, Android tools) can’t find a JDK.

IndentationErrorPython

IndentationError: unexpected indent / expected an indented block

Python’s block structure is broken — inconsistent indentation or mixed tabs and spaces.

COPY failedDocker

COPY failed: file not found in build context / "/app/x": not found

The Dockerfile COPY refers to a path outside the build context, excluded by .dockerignore, or relative to the wrong directory.

error converting YAML to JSONKubernetes

error converting YAML to JSON: yaml: line 12: did not find expected key

The manifest isn’t valid YAML — usually indentation, a tab character, or an unquoted special character.

iptables: No chain/target/matchDocker

driver failed programming external connectivity on endpoint: iptables: No chain/target/match by that name

Docker’s iptables rules were wiped (firewalld/ufw reload, iptables flush) while Docker was running, so it can’t publish ports.

NetworkOnMainThreadExceptionAndroid

android.os.NetworkOnMainThreadException

The app made a network call on the main (UI) thread, which Android forbids.

actively refused it.NET

HttpRequestException: No connection could be made because the target machine actively refused it (localhost:5001)

Nothing is listening on the host/port the client called — the API isn’t running, uses another port, or the container/network addr…

Conflict container nameDocker

Conflict. The container name "/x" is already in use by container …

A container (running or stopped) already has that name; Docker won’t create a second one with the same name.

Health checks failedAWS

ALB target unhealthy: Health checks failed with these codes: [404] / Request timed out

The load balancer’s health checks to your targets fail, so it stops sending traffic (and returns 502/503 if no targets are health…

Exited (0)Docker

Docker container exits immediately (Exited (0) / Exited (1) right after start)

The container started and its main process finished at once, so the container stopped — Docker containers only live as long as PI…

DEP0005Node.js

DeprecationWarning: Buffer() is deprecated due to security and usability issues (DEP0005)

Code (yours or a dependency) uses the deprecated new Buffer() constructor.

DEP0040Node.js

DeprecationWarning: The `punycode` module is deprecated (DEP0040)

A dependency imports Node’s built-in punycode module, deprecated since Node 21.

npm WARN deprecatednpm

npm WARN deprecated package@1.2.3: This package is no longer supported.

A dependency (often a transitive one) is deprecated by its author.

provided port is not in the valid rangeKubernetes

spec.ports[0].nodePort: Invalid value: 80: provided port is not in the valid range. The range of valid ports is 30000-32767

A NodePort Service asked for a port outside the cluster’s NodePort range (default 30000–32767).

NSURLErrorDomain Code=-1009iOS

Error Domain=NSURLErrorDomain Code=-1009 "The Internet connection appears to be offline."

URLSession couldn’t reach the network — the device is offline, the app’s cellular data is disabled, or the simulator lost network…

NSURLErrorDomain Code=-1001iOS

Error Domain=NSURLErrorDomain Code=-1001 "The request timed out."

The server didn’t respond within URLSession’s timeout (60 s default) — slow server, unreachable host on this network, or a stalle…

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