[PR #599] [MERGED] Fixing container inspect error #613

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opened 2026-02-26 04:35:46 +03:00 by kerem · 0 comments

kerem commented

2026-02-26 04:35:46 +03:00

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📋 Pull Request Information

Original PR: https://github.com/mageddo/dns-proxy-server/pull/599
Author: @defung
Created: 11/7/2024
Status: ✅ Merged
Merged: 11/18/2024
Merged by: @mageddo

Base: develop ← Head: fix_inspect_error

📝 Commits (2)

2da2c46 fix inspect error
98f47e4 bump docker-java version

📊 Changes

7 files changed (+208 additions, -10 deletions)

View changed files

📝 build.gradle (+2 -2)
📝 src/main/java/com/mageddo/dnsproxyserver/docker/dataprovider/ContainerFacade.java (+2 -1)
📝 src/main/java/com/mageddo/dnsproxyserver/docker/dataprovider/ContainerFacadeDefault.java (+12 -2)
📝 src/main/java/com/mageddo/dnsproxyserver/solver/docker/dataprovider/ContainerDAODefault.java (+1 -1)
📝 src/main/java/com/mageddo/dnsproxyserver/solver/docker/dataprovider/DpsContainerDAODefault.java (+1 -1)
➕ src/test/java/com/mageddo/dnsproxyserver/docker/ContainerFacadeDefaultTest.java (+152 -0)
📝 src/test/java/testing/mocks/DockerClientStub.java (+38 -3)

📄 Description

Been playing around with DPS recently, and came across a bug in docker-java (here).

If a container is configured with CAP_ADD or CAP_DROP in lowercase, DPS fails with a nasty exception (seen below).

While waiting for docker-java to fix this bug, I figured it would be good if we add some defensive coding here on this side, so it won't fail all DNS lookups if there's a single bad container.

Let me know what you think!

17:56:16.572 [virtual-186646 ] WAR c.m.d.server.dns.RequestHandlerDefault            l=101  m=solveAndSummarizeHandlingError  status=solverFailed, currentSolverTime=12, totalTime=12, solver=SolverDocker, query=query=A:zoneminder.dj-server.lan, eClass=RuntimeException, msg=com.fasterxml.jackson.databind.exc.InvalidFormatException: Cannot deserialize value of type `com.github.dockerjava.api.model.Capability` from String "net_raw": not one of the values accepted for Enum class: [ALL, SYS_BOOT, DAC_OVERRIDE, NET_RAW, BLOCK_SUSPEND, FOWNER, IPC_LOCK, IPC_OWNER, SYS_PACCT, NET_BIND_SERVICE, WAKE_ALARM, FSETID, DAC_READ_SEARCH, SYS_CHROOT, AUDIT_READ, SYS_RAWIO, SYS_ADMIN, KILL, MAC_ADMIN, SYS_RESOURCE, CHOWN, PERFMON, SETPCAP, SYS_PTRACE, NET_ADMIN, SETFCAP, SYS_NICE, LINUX_IMMUTABLE, BPF, AUDIT_CONTROL, LEASE, AUDIT_WRITE, SYS_MODULE, MKNOD, SYSLOG, MAC_OVERRIDE, SYS_TIME, SETGID, SETUID, CHECKPOINT_RESTORE, SYS_TTY_CONFIG, NET_BROADCAST]
 at [Source: UNKNOWN; byte offset: #UNKNOWN] (through reference chain: com.github.dockerjava.api.command.InspectContainerResponse["HostConfig"]->com.github.dockerjava.api.model.HostConfig["CapDrop"]->java.lang.Object[][0])
java.lang.RuntimeException: com.fasterxml.jackson.databind.exc.InvalidFormatException: Cannot deserialize value of type `com.github.dockerjava.api.model.Capability` from String "net_raw": not one of the values accepted for Enum class: [ALL, SYS_BOOT, DAC_OVERRIDE, NET_RAW, BLOCK_SUSPEND, FOWNER, IPC_LOCK, IPC_OWNER, SYS_PACCT, NET_BIND_SERVICE, WAKE_ALARM, FSETID, DAC_READ_SEARCH, SYS_CHROOT, AUDIT_READ, SYS_RAWIO, SYS_ADMIN, KILL, MAC_ADMIN, SYS_RESOURCE, CHOWN, PERFMON, SETPCAP, SYS_PTRACE, NET_ADMIN, SETFCAP, SYS_NICE, LINUX_IMMUTABLE, BPF, AUDIT_CONTROL, LEASE, AUDIT_WRITE, SYS_MODULE, MKNOD, SYSLOG, MAC_OVERRIDE, SYS_TIME, SETGID, SETUID, CHECKPOINT_RESTORE, SYS_TTY_CONFIG, NET_BROADCAST]
 at [Source: UNKNOWN; byte offset: #UNKNOWN] (through reference chain: com.github.dockerjava.api.command.InspectContainerResponse["HostConfig"]->com.github.dockerjava.api.model.HostConfig["CapDrop"]->java.lang.Object[][0])
	at com.github.dockerjava.core.DefaultInvocationBuilder.get(DefaultInvocationBuilder.java:77)
	at com.github.dockerjava.core.exec.InspectContainerCmdExec.execute(InspectContainerCmdExec.java:31)
	at com.github.dockerjava.core.exec.InspectContainerCmdExec.execute(InspectContainerCmdExec.java:13)
	at com.github.dockerjava.core.exec.AbstrSyncDockerCmdExec.exec(AbstrSyncDockerCmdExec.java:21)
	at com.github.dockerjava.core.command.AbstrDockerCmd.exec(AbstrDockerCmd.java:33)
	at com.github.dockerjava.core.command.InspectContainerCmdImpl.exec(InspectContainerCmdImpl.java:51)
	at com.mageddo.dnsproxyserver.docker.dataprovider.ContainerFacadeDefault.inspect(ContainerFacadeDefault.java:48)
	at com.mageddo.dnsproxyserver.solver.docker.dataprovider.ContainerDAODefault.lambda$findActiveContainersMatching$0(ContainerDAODefault.java:31)
	at java.base@21.0.2/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197)
	at java.base@21.0.2/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1708)
	at java.base@21.0.2/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509)
	at java.base@21.0.2/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
	at java.base@21.0.2/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:575)
	at java.base@21.0.2/java.util.stream.AbstractPipeline.evaluateToArrayNode(AbstractPipeline.java:260)
	at java.base@21.0.2/java.util.stream.ReferencePipeline.toArray(ReferencePipeline.java:616)
	at java.base@21.0.2/java.util.stream.ReferencePipeline.toArray(ReferencePipeline.java:622)
	at java.base@21.0.2/java.util.stream.ReferencePipeline.toList(ReferencePipeline.java:627)
	at com.mageddo.dnsproxyserver.solver.docker.dataprovider.ContainerDAODefault.findActiveContainersMatching(ContainerDAODefault.java:34)
	at com.mageddo.dnsproxyserver.solver.docker.application.ContainerSolvingService.findBestMatch(ContainerSolvingService.java:39)
	at com.mageddo.dnsproxyserver.solver.SolverDocker.lambda$handle$0(SolverDocker.java:40)
	at com.mageddo.dnsproxyserver.solver.HostnameMatcher.match(HostnameMatcher.java:22)
	at com.mageddo.dnsproxyserver.solver.SolverDocker.handle(SolverDocker.java:39)
	at com.mageddo.dnsproxyserver.server.dns.RequestHandlerDefault.solveAndSummarize(RequestHandlerDefault.java:115)
	at com.mageddo.dnsproxyserver.server.dns.RequestHandlerDefault.solveAndSummarizeHandlingError(RequestHandlerDefault.java:99)
	at com.mageddo.dnsproxyserver.server.dns.RequestHandlerDefault.solve(RequestHandlerDefault.java:82)
	at com.mageddo.dnsproxyserver.server.dns.RequestHandlerDefault.solveFixingCacheTTL(RequestHandlerDefault.java:73)
	at com.mageddo.dnsproxyserver.solver.SolverCache.calculateValueWithoutLocks(SolverCache.java:70)
	at com.mageddo.dnsproxyserver.solver.SolverCache.handleRes(SolverCache.java:51)
	at com.mageddo.dnsproxyserver.solver.SolverCache.handle(SolverCache.java:40)
	at com.mageddo.dnsproxyserver.server.dns.RequestHandlerDefault.solveCaching(RequestHandlerDefault.java:66)
	at com.mageddo.dnsproxyserver.server.dns.RequestHandlerDefault.handle(RequestHandlerDefault.java:54)
	at com.mageddo.dnsserver.UDPServer.handle(UDPServer.java:55)
	at com.mageddo.dnsserver.UDPServer.lambda$start0$0(UDPServer.java:43)
	at java.base@21.0.2/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:572)
	at java.base@21.0.2/java.util.concurrent.FutureTask.run(FutureTask.java:317)
	at java.base@21.0.2/java.lang.Thread.runWith(Thread.java:1596)
	at java.base@21.0.2/java.lang.VirtualThread.run(VirtualThread.java:309)
	at java.base@21.0.2/java.lang.VirtualThread$VThreadContinuation$1.run(VirtualThread.java:190)
Caused by: com.fasterxml.jackson.databind.exc.InvalidFormatException: Cannot deserialize value of type `com.github.dockerjava.api.model.Capability` from String "net_raw": not one of the values accepted for Enum class: [ALL, SYS_BOOT, DAC_OVERRIDE, NET_RAW, BLOCK_SUSPEND, FOWNER, IPC_LOCK, IPC_OWNER, SYS_PACCT, NET_BIND_SERVICE, WAKE_ALARM, FSETID, DAC_READ_SEARCH, SYS_CHROOT, AUDIT_READ, SYS_RAWIO, SYS_ADMIN, KILL, MAC_ADMIN, SYS_RESOURCE, CHOWN, PERFMON, SETPCAP, SYS_PTRACE, NET_ADMIN, SETFCAP, SYS_NICE, LINUX_IMMUTABLE, BPF, AUDIT_CONTROL, LEASE, AUDIT_WRITE, SYS_MODULE, MKNOD, SYSLOG, MAC_OVERRIDE, SYS_TIME, SETGID, SETUID, CHECKPOINT_RESTORE, SYS_TTY_CONFIG, NET_BROADCAST]
 at [Source: UNKNOWN; byte offset: #UNKNOWN] (through reference chain: com.github.dockerjava.api.command.InspectContainerResponse["HostConfig"]->com.github.dockerjava.api.model.HostConfig["CapDrop"]->java.lang.Object[][0])
	at com.fasterxml.jackson.databind.DeserializationContext.weirdStringException(DeserializationContext.java:1958)
	at com.fasterxml.jackson.databind.DeserializationContext.handleWeirdStringValue(DeserializationContext.java:1245)
	at com.fasterxml.jackson.databind.deser.std.EnumDeserializer._deserializeAltString(EnumDeserializer.java:447)
	at com.fasterxml.jackson.databind.deser.std.EnumDeserializer._fromString(EnumDeserializer.java:304)
	at com.fasterxml.jackson.databind.deser.std.EnumDeserializer.deserialize(EnumDeserializer.java:273)
	at com.fasterxml.jackson.databind.deser.std.ObjectArrayDeserializer.deserialize(ObjectArrayDeserializer.java:218)
	at com.fasterxml.jackson.databind.deser.impl.FieldProperty.deserializeAndSet(FieldProperty.java:138)
	at com.fasterxml.jackson.databind.deser.BeanDeserializer.vanillaDeserialize(BeanDeserializer.java:310)
	at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:177)
	at com.fasterxml.jackson.databind.deser.impl.FieldProperty.deserializeAndSet(FieldProperty.java:138)
	at com.fasterxml.jackson.databind.deser.BeanDeserializer.vanillaDeserialize(BeanDeserializer.java:310)
	at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:177)
	at com.fasterxml.jackson.databind.deser.DefaultDeserializationContext.readRootValue(DefaultDeserializationContext.java:342)
	at com.fasterxml.jackson.databind.ObjectMapper._readValue(ObjectMapper.java:4881)
	at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:3035)
	at com.fasterxml.jackson.databind.ObjectMapper.treeToValue(ObjectMapper.java:3499)
	at com.github.dockerjava.core.DockerObjectDeserializer.deserialize(DockerClientConfig.java:132)
	at com.fasterxml.jackson.databind.deser.DefaultDeserializationContext.readRootValue(DefaultDeserializationContext.java:342)
	at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:4905)
	at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:3893)
	at com.github.dockerjava.core.DefaultInvocationBuilder.get(DefaultInvocationBuilder.java:75)
	... 37 common frames omitted
17:56:16.572 [virtual-186646 ] WAR c.m.d.server.dns.RequestHandlerDefault            l=56   m=handle                          status=solverFailed, totalTime=13, eClass=NullPointerException, msg=null
java.lang.NullPointerException: null
	at com.mageddo.dnsproxyserver.server.dns.RequestHandlerDefault.solve(RequestHandlerDefault.java:83)
	at com.mageddo.dnsproxyserver.server.dns.RequestHandlerDefault.solveFixingCacheTTL(RequestHandlerDefault.java:73)
	at com.mageddo.dnsproxyserver.solver.SolverCache.calculateValueWithoutLocks(SolverCache.java:70)
	at com.mageddo.dnsproxyserver.solver.SolverCache.handleRes(SolverCache.java:51)
	at com.mageddo.dnsproxyserver.solver.SolverCache.handle(SolverCache.java:40)
	at com.mageddo.dnsproxyserver.server.dns.RequestHandlerDefault.solveCaching(RequestHandlerDefault.java:66)
	at com.mageddo.dnsproxyserver.server.dns.RequestHandlerDefault.handle(RequestHandlerDefault.java:54)
	at com.mageddo.dnsserver.UDPServer.handle(UDPServer.java:55)
	at com.mageddo.dnsserver.UDPServer.lambda$start0$0(UDPServer.java:43)
	at java.base@21.0.2/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:572)
	at java.base@21.0.2/java.util.concurrent.FutureTask.run(FutureTask.java:317)
	at java.base@21.0.2/java.lang.Thread.runWith(Thread.java:1596)
	at java.base@21.0.2/java.lang.VirtualThread.run(VirtualThread.java:309)
	at java.base@21.0.2/java.lang.VirtualThread$VThreadContinuation$1.run(VirtualThread.java:190)

_{🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.}

## 📋 Pull Request Information **Original PR:** https://github.com/mageddo/dns-proxy-server/pull/599 **Author:** [@defung](https://github.com/defung) **Created:** 11/7/2024 **Status:** ✅ Merged **Merged:** 11/18/2024 **Merged by:** [@mageddo](https://github.com/mageddo) **Base:** `develop` ← **Head:** `fix_inspect_error` --- ### 📝 Commits (2) - [`2da2c46`](https://github.com/mageddo/dns-proxy-server/commit/2da2c46469d08d180f35289b849ad6c9c5c0c8d5) fix inspect error - [`98f47e4`](https://github.com/mageddo/dns-proxy-server/commit/98f47e48b5b5aad765fce4ab9e0e2a337298eee0) bump docker-java version ### 📊 Changes **7 files changed** (+208 additions, -10 deletions) <details> <summary>View changed files</summary> 📝 `build.gradle` (+2 -2) 📝 `src/main/java/com/mageddo/dnsproxyserver/docker/dataprovider/ContainerFacade.java` (+2 -1) 📝 `src/main/java/com/mageddo/dnsproxyserver/docker/dataprovider/ContainerFacadeDefault.java` (+12 -2) 📝 `src/main/java/com/mageddo/dnsproxyserver/solver/docker/dataprovider/ContainerDAODefault.java` (+1 -1) 📝 `src/main/java/com/mageddo/dnsproxyserver/solver/docker/dataprovider/DpsContainerDAODefault.java` (+1 -1) ➕ `src/test/java/com/mageddo/dnsproxyserver/docker/ContainerFacadeDefaultTest.java` (+152 -0) 📝 `src/test/java/testing/mocks/DockerClientStub.java` (+38 -3) </details> ### 📄 Description Been playing around with DPS recently, and came across a bug in `docker-java` ([here](https://github.com/docker-java/docker-java/issues/2365)). If a container is configured with `CAP_ADD` or `CAP_DROP` in lowercase, DPS fails with a nasty exception (seen below). While waiting for `docker-java` to fix this bug, I figured it would be good if we add some defensive coding here on this side, so it won't fail all DNS lookups if there's a single bad container. Let me know what you think! ``` 17:56:16.572 [virtual-186646 ] WAR c.m.d.server.dns.RequestHandlerDefault l=101 m=solveAndSummarizeHandlingError status=solverFailed, currentSolverTime=12, totalTime=12, solver=SolverDocker, query=query=A:zoneminder.dj-server.lan, eClass=RuntimeException, msg=com.fasterxml.jackson.databind.exc.InvalidFormatException: Cannot deserialize value of type `com.github.dockerjava.api.model.Capability` from String "net_raw": not one of the values accepted for Enum class: [ALL, SYS_BOOT, DAC_OVERRIDE, NET_RAW, BLOCK_SUSPEND, FOWNER, IPC_LOCK, IPC_OWNER, SYS_PACCT, NET_BIND_SERVICE, WAKE_ALARM, FSETID, DAC_READ_SEARCH, SYS_CHROOT, AUDIT_READ, SYS_RAWIO, SYS_ADMIN, KILL, MAC_ADMIN, SYS_RESOURCE, CHOWN, PERFMON, SETPCAP, SYS_PTRACE, NET_ADMIN, SETFCAP, SYS_NICE, LINUX_IMMUTABLE, BPF, AUDIT_CONTROL, LEASE, AUDIT_WRITE, SYS_MODULE, MKNOD, SYSLOG, MAC_OVERRIDE, SYS_TIME, SETGID, SETUID, CHECKPOINT_RESTORE, SYS_TTY_CONFIG, NET_BROADCAST] at [Source: UNKNOWN; byte offset: #UNKNOWN] (through reference chain: com.github.dockerjava.api.command.InspectContainerResponse["HostConfig"]->com.github.dockerjava.api.model.HostConfig["CapDrop"]->java.lang.Object[][0]) java.lang.RuntimeException: com.fasterxml.jackson.databind.exc.InvalidFormatException: Cannot deserialize value of type `com.github.dockerjava.api.model.Capability` from String "net_raw": not one of the values accepted for Enum class: [ALL, SYS_BOOT, DAC_OVERRIDE, NET_RAW, BLOCK_SUSPEND, FOWNER, IPC_LOCK, IPC_OWNER, SYS_PACCT, NET_BIND_SERVICE, WAKE_ALARM, FSETID, DAC_READ_SEARCH, SYS_CHROOT, AUDIT_READ, SYS_RAWIO, SYS_ADMIN, KILL, MAC_ADMIN, SYS_RESOURCE, CHOWN, PERFMON, SETPCAP, SYS_PTRACE, NET_ADMIN, SETFCAP, SYS_NICE, LINUX_IMMUTABLE, BPF, AUDIT_CONTROL, LEASE, AUDIT_WRITE, SYS_MODULE, MKNOD, SYSLOG, MAC_OVERRIDE, SYS_TIME, SETGID, SETUID, CHECKPOINT_RESTORE, SYS_TTY_CONFIG, NET_BROADCAST] at [Source: UNKNOWN; byte offset: #UNKNOWN] (through reference chain: com.github.dockerjava.api.command.InspectContainerResponse["HostConfig"]->com.github.dockerjava.api.model.HostConfig["CapDrop"]->java.lang.Object[][0]) at com.github.dockerjava.core.DefaultInvocationBuilder.get(DefaultInvocationBuilder.java:77) at com.github.dockerjava.core.exec.InspectContainerCmdExec.execute(InspectContainerCmdExec.java:31) at com.github.dockerjava.core.exec.InspectContainerCmdExec.execute(InspectContainerCmdExec.java:13) at com.github.dockerjava.core.exec.AbstrSyncDockerCmdExec.exec(AbstrSyncDockerCmdExec.java:21) at com.github.dockerjava.core.command.AbstrDockerCmd.exec(AbstrDockerCmd.java:33) at com.github.dockerjava.core.command.InspectContainerCmdImpl.exec(InspectContainerCmdImpl.java:51) at com.mageddo.dnsproxyserver.docker.dataprovider.ContainerFacadeDefault.inspect(ContainerFacadeDefault.java:48) at com.mageddo.dnsproxyserver.solver.docker.dataprovider.ContainerDAODefault.lambda$findActiveContainersMatching$0(ContainerDAODefault.java:31) at java.base@21.0.2/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197) at java.base@21.0.2/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1708) at java.base@21.0.2/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) at java.base@21.0.2/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) at java.base@21.0.2/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:575) at java.base@21.0.2/java.util.stream.AbstractPipeline.evaluateToArrayNode(AbstractPipeline.java:260) at java.base@21.0.2/java.util.stream.ReferencePipeline.toArray(ReferencePipeline.java:616) at java.base@21.0.2/java.util.stream.ReferencePipeline.toArray(ReferencePipeline.java:622) at java.base@21.0.2/java.util.stream.ReferencePipeline.toList(ReferencePipeline.java:627) at com.mageddo.dnsproxyserver.solver.docker.dataprovider.ContainerDAODefault.findActiveContainersMatching(ContainerDAODefault.java:34) at com.mageddo.dnsproxyserver.solver.docker.application.ContainerSolvingService.findBestMatch(ContainerSolvingService.java:39) at com.mageddo.dnsproxyserver.solver.SolverDocker.lambda$handle$0(SolverDocker.java:40) at com.mageddo.dnsproxyserver.solver.HostnameMatcher.match(HostnameMatcher.java:22) at com.mageddo.dnsproxyserver.solver.SolverDocker.handle(SolverDocker.java:39) at com.mageddo.dnsproxyserver.server.dns.RequestHandlerDefault.solveAndSummarize(RequestHandlerDefault.java:115) at com.mageddo.dnsproxyserver.server.dns.RequestHandlerDefault.solveAndSummarizeHandlingError(RequestHandlerDefault.java:99) at com.mageddo.dnsproxyserver.server.dns.RequestHandlerDefault.solve(RequestHandlerDefault.java:82) at com.mageddo.dnsproxyserver.server.dns.RequestHandlerDefault.solveFixingCacheTTL(RequestHandlerDefault.java:73) at com.mageddo.dnsproxyserver.solver.SolverCache.calculateValueWithoutLocks(SolverCache.java:70) at com.mageddo.dnsproxyserver.solver.SolverCache.handleRes(SolverCache.java:51) at com.mageddo.dnsproxyserver.solver.SolverCache.handle(SolverCache.java:40) at com.mageddo.dnsproxyserver.server.dns.RequestHandlerDefault.solveCaching(RequestHandlerDefault.java:66) at com.mageddo.dnsproxyserver.server.dns.RequestHandlerDefault.handle(RequestHandlerDefault.java:54) at com.mageddo.dnsserver.UDPServer.handle(UDPServer.java:55) at com.mageddo.dnsserver.UDPServer.lambda$start0$0(UDPServer.java:43) at java.base@21.0.2/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:572) at java.base@21.0.2/java.util.concurrent.FutureTask.run(FutureTask.java:317) at java.base@21.0.2/java.lang.Thread.runWith(Thread.java:1596) at java.base@21.0.2/java.lang.VirtualThread.run(VirtualThread.java:309) at java.base@21.0.2/java.lang.VirtualThread$VThreadContinuation$1.run(VirtualThread.java:190) Caused by: com.fasterxml.jackson.databind.exc.InvalidFormatException: Cannot deserialize value of type `com.github.dockerjava.api.model.Capability` from String "net_raw": not one of the values accepted for Enum class: [ALL, SYS_BOOT, DAC_OVERRIDE, NET_RAW, BLOCK_SUSPEND, FOWNER, IPC_LOCK, IPC_OWNER, SYS_PACCT, NET_BIND_SERVICE, WAKE_ALARM, FSETID, DAC_READ_SEARCH, SYS_CHROOT, AUDIT_READ, SYS_RAWIO, SYS_ADMIN, KILL, MAC_ADMIN, SYS_RESOURCE, CHOWN, PERFMON, SETPCAP, SYS_PTRACE, NET_ADMIN, SETFCAP, SYS_NICE, LINUX_IMMUTABLE, BPF, AUDIT_CONTROL, LEASE, AUDIT_WRITE, SYS_MODULE, MKNOD, SYSLOG, MAC_OVERRIDE, SYS_TIME, SETGID, SETUID, CHECKPOINT_RESTORE, SYS_TTY_CONFIG, NET_BROADCAST] at [Source: UNKNOWN; byte offset: #UNKNOWN] (through reference chain: com.github.dockerjava.api.command.InspectContainerResponse["HostConfig"]->com.github.dockerjava.api.model.HostConfig["CapDrop"]->java.lang.Object[][0]) at com.fasterxml.jackson.databind.DeserializationContext.weirdStringException(DeserializationContext.java:1958) at com.fasterxml.jackson.databind.DeserializationContext.handleWeirdStringValue(DeserializationContext.java:1245) at com.fasterxml.jackson.databind.deser.std.EnumDeserializer._deserializeAltString(EnumDeserializer.java:447) at com.fasterxml.jackson.databind.deser.std.EnumDeserializer._fromString(EnumDeserializer.java:304) at com.fasterxml.jackson.databind.deser.std.EnumDeserializer.deserialize(EnumDeserializer.java:273) at com.fasterxml.jackson.databind.deser.std.ObjectArrayDeserializer.deserialize(ObjectArrayDeserializer.java:218) at com.fasterxml.jackson.databind.deser.impl.FieldProperty.deserializeAndSet(FieldProperty.java:138) at com.fasterxml.jackson.databind.deser.BeanDeserializer.vanillaDeserialize(BeanDeserializer.java:310) at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:177) at com.fasterxml.jackson.databind.deser.impl.FieldProperty.deserializeAndSet(FieldProperty.java:138) at com.fasterxml.jackson.databind.deser.BeanDeserializer.vanillaDeserialize(BeanDeserializer.java:310) at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:177) at com.fasterxml.jackson.databind.deser.DefaultDeserializationContext.readRootValue(DefaultDeserializationContext.java:342) at com.fasterxml.jackson.databind.ObjectMapper._readValue(ObjectMapper.java:4881) at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:3035) at com.fasterxml.jackson.databind.ObjectMapper.treeToValue(ObjectMapper.java:3499) at com.github.dockerjava.core.DockerObjectDeserializer.deserialize(DockerClientConfig.java:132) at com.fasterxml.jackson.databind.deser.DefaultDeserializationContext.readRootValue(DefaultDeserializationContext.java:342) at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:4905) at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:3893) at com.github.dockerjava.core.DefaultInvocationBuilder.get(DefaultInvocationBuilder.java:75) ... 37 common frames omitted 17:56:16.572 [virtual-186646 ] WAR c.m.d.server.dns.RequestHandlerDefault l=56 m=handle status=solverFailed, totalTime=13, eClass=NullPointerException, msg=null java.lang.NullPointerException: null at com.mageddo.dnsproxyserver.server.dns.RequestHandlerDefault.solve(RequestHandlerDefault.java:83) at com.mageddo.dnsproxyserver.server.dns.RequestHandlerDefault.solveFixingCacheTTL(RequestHandlerDefault.java:73) at com.mageddo.dnsproxyserver.solver.SolverCache.calculateValueWithoutLocks(SolverCache.java:70) at com.mageddo.dnsproxyserver.solver.SolverCache.handleRes(SolverCache.java:51) at com.mageddo.dnsproxyserver.solver.SolverCache.handle(SolverCache.java:40) at com.mageddo.dnsproxyserver.server.dns.RequestHandlerDefault.solveCaching(RequestHandlerDefault.java:66) at com.mageddo.dnsproxyserver.server.dns.RequestHandlerDefault.handle(RequestHandlerDefault.java:54) at com.mageddo.dnsserver.UDPServer.handle(UDPServer.java:55) at com.mageddo.dnsserver.UDPServer.lambda$start0$0(UDPServer.java:43) at java.base@21.0.2/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:572) at java.base@21.0.2/java.util.concurrent.FutureTask.run(FutureTask.java:317) at java.base@21.0.2/java.lang.Thread.runWith(Thread.java:1596) at java.base@21.0.2/java.lang.VirtualThread.run(VirtualThread.java:309) at java.base@21.0.2/java.lang.VirtualThread$VThreadContinuation$1.run(VirtualThread.java:190) ``` --- <sub>🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.</sub>