conversion of VMware to KVM of Windows VMs fails

[ingox]

problem

The migration of a Windows VM from VMware to KVM by using the "Import-Export Instances" functionality fails.

The agent.log file states that a different version of virt-v2v should be used.

Here is the log output of the agent.log:

2025-09-02 10:23:50,393 WARN [resource.wrapper.LibvirtConvertInstanceCommandWrapper] (AgentRequest-Handler-2:[]) (logid:) Exception [Stream closed] occurred when attempting to run command [virt-v2v --root first -i ova /mnt/f16f10e2-5272-3087-b0e3-bf664ec5b296/12aca5b3-739a-44f4-b9af-50d67007007f/i-2-20-VM/ -o local -os /mnt/f16f10e2-5272-3087-b0e3-bf664ec5b296 -of qcow2 -on e34c9a09-d5ea-4191-890b-a04f6a8c9b48 -v ]. java.io.IOException: Stream closed
at java.base/java.io.BufferedInputStream.getBufIfOpen(BufferedInputStream.java:168)
at java.base/java.io.BufferedInputStream.read(BufferedInputStream.java:334)
at java.base/sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:287)
at java.base/sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:330)
at java.base/sun.nio.cs.StreamDecoder.read(StreamDecoder.java:190)
at java.base/java.io.InputStreamReader.read(InputStreamReader.java:177)
at java.base/java.io.BufferedReader.fill(BufferedReader.java:162)
at java.base/java.io.BufferedReader.readLine(BufferedReader.java:329)
at java.base/java.io.BufferedReader.readLine(BufferedReader.java:396)
at com.cloud.utils.script.OutputInterpreter.processError(OutputInterpreter.java:41)
at com.cloud.utils.script.Script.execute(Script.java:305)
at com.cloud.hypervisor.kvm.resource.wrapper.LibvirtConvertInstanceCommandWrapper.performInstanceConversion(LibvirtConvertInstanceCommandWrapper.java:410)
at com.cloud.hypervisor.kvm.resource.wrapper.LibvirtConvertInstanceCommandWrapper.execute(LibvirtConvertInstanceCommandWrapper.java:134)
at com.cloud.hypervisor.kvm.resource.wrapper.LibvirtConvertInstanceCommandWrapper.execute(LibvirtConvertInstanceCommandWrapper.java:61)
at com.cloud.hypervisor.kvm.resource.wrapper.LibvirtRequestWrapper.execute(LibvirtRequestWrapper.java:78)
at com.cloud.hypervisor.kvm.resource.LibvirtComputingResource.executeRequest(LibvirtComputingResource.java:1958)
at com.cloud.agent.Agent.processRequest(Agent.java:779)
at com.cloud.agent.Agent$AgentRequestHandler.doTask(Agent.java:1194)
at com.cloud.utils.nio.Task.call(Task.java:83)
at com.cloud.utils.nio.Task.call(Task.java:29)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.lang.Thread.run(Thread.java:840)

2025-09-02 10:23:50,393 ERROR [resource.wrapper.LibvirtConvertInstanceCommandWrapper] (AgentRequest-Handler-2:[]) (logid:) The virt-v2v conversion for the OVF 12aca5b3-739a-44f4-b9af-50d67007007f failed. Please check the agent logs for the virt-v2v output. Please try on a different kvm host which has a different virt-v2v version.

versions

virt-v2v 2.4.0

Ubuntu 24.04 LTS

ACS 4.20.1.0

The steps to reproduce the bug

1. Configure the KVM hypervisor like described here: https://docs.cloudstack.apache.org/en/latest/adminguide/virtual_machines/importing_vmware_vms_into_kvm.html or https://www.shapeblue.com/cloudstack-vmware-to-kvm-migration-tool/
2. Use the export import tool in CloudStack.
3. Choose a Windows VM to convert
4. Give it a name
5. Select the prepared hypervisor.
6. Wait until the error appears. Can take a while until the conversion happened, depending on the size of the disk....

What to do about it?

No response

[sureshanaparti]

@ingox Have you noticed any conversion issues with virt-v2v in the agent log (to enable virt-v2v logs, set virtv2v.verbose.enabled=true in /etc/cloudstack/agent/agent.properties and restart agent, try import Windows VM again).

[ingox]

@sureshanaparti virtv2v.verbose.enabled=true was already set. These are all errors and warnings with virt-v2v.

2025-09-02 07:05:34,422 INFO [resource.wrapper.LibvirtConvertInstanceCommandWrapper] (Script-2:[]) (logid:) (virt-v2v ovf source: /mnt/f16f10e2-5272-3087-b0e3-bf664ec5b296/b507fcf9-928a-483b-9cc8-e12b23c57a83/i-2-20-VM/ progress) [ 0.283398] Speculative Return Stack Overflow: WARNING: See https://kernel.org/doc/html/latest/admin-guide/hw-vuln/srso.html for mitigation options.
2025-09-02 07:05:57,485 ERROR [resource.wrapper.LibvirtConvertInstanceCommandWrapper] (AgentRequest-Handler-1:[]) (logid:) The virt-v2v conversion for the OVF b507fcf9-928a-483b-9cc8-e12b23c57a83 failed. Please check the agent logs for the virt-v2v output. Please try on a different kvm host which has a different virt-v2v version.
2025-09-02 07:49:21,363 INFO [resource.wrapper.LibvirtConvertInstanceCommandWrapper] (Script-8:[]) (logid:) (virt-v2v ovf source: /mnt/f16f10e2-5272-3087-b0e3-bf664ec5b296/80606be1-73d0-44be-9f04-022f927d936e/i-2-20-VM/ progress) [ 0.261584] Speculative Return Stack Overflow: WARNING: See https://kernel.org/doc/html/latest/admin-guide/hw-vuln/srso.html for mitigation options.
2025-09-02 07:49:37,724 ERROR [resource.wrapper.LibvirtConvertInstanceCommandWrapper] (AgentRequest-Handler-2:[]) (logid:) The virt-v2v conversion for the OVF 80606be1-73d0-44be-9f04-022f927d936e failed. Please check the agent logs for the virt-v2v output. Please try on a different kvm host which has a different virt-v2v version.
2025-09-02 09:16:06,553 INFO [resource.wrapper.LibvirtConvertInstanceCommandWrapper] (Script-5:[]) (logid:) (virt-v2v ovf source: /mnt/f16f10e2-5272-3087-b0e3-bf664ec5b296/96e39639-b917-4d39-a732-c3a89d9c6f37/i-2-7-VM/ progress) [ 0.232246] Speculative Return Stack Overflow: WARNING: See https://kernel.org/doc/html/latest/admin-guide/hw-vuln/srso.html for mitigation options.
2025-09-02 09:49:38,703 INFO [resource.wrapper.LibvirtConvertInstanceCommandWrapper] (Script-4:[]) (logid:) (virt-v2v ovf source: /mnt/f16f10e2-5272-3087-b0e3-bf664ec5b296/527dc334-e4a0-4718-8320-4079d3d04d13/i-2-22-VM/ progress) [ 0.222303] Speculative Return Stack Overflow: WARNING: See https://kernel.org/doc/html/latest/admin-guide/hw-vuln/srso.html for mitigation options.
2025-09-02 10:23:33,799 INFO [resource.wrapper.LibvirtConvertInstanceCommandWrapper] (Script-3:[]) (logid:) (virt-v2v ovf source: /mnt/f16f10e2-5272-3087-b0e3-bf664ec5b296/12aca5b3-739a-44f4-b9af-50d67007007f/i-2-20-VM/ progress) [ 0.336133] Speculative Return Stack Overflow: WARNING: See https://kernel.org/doc/html/latest/admin-guide/hw-vuln/srso.html for mitigation options.
2025-09-02 10:23:50,393 ERROR [resource.wrapper.LibvirtConvertInstanceCommandWrapper] (AgentRequest-Handler-2:[]) (logid:) The virt-v2v conversion for the OVF 12aca5b3-739a-44f4-b9af-50d67007007f failed. Please check the agent logs for the virt-v2v output. Please try on a different kvm host which has a different virt-v2v version.

[NuxRo]

@ingox please follow https://www.shapeblue.com/cloudstack-vmware-to-kvm-migration-tool/

Also please enable DEBUG log in your installation, it looks like we're missing some context here.
https://www.nux.ro/How_to_enable_DEBUG_mode_in_Cloudstack/

[ingox]

@NuxRo I have been following this documentation.
Here are the logs.
agent.log:

2025-09-03 07:13:33,154 INFO  [resource.wrapper.LibvirtConvertInstanceCommandWrapper] (Script-5:[]) (logid:) (virt-v2v ovf source: /mnt/f16f10e2-5272-3087-b0e3-bf664ec5b296/64beae76-59f2-4b30-a82c-48d7fd3869cb/i-2-20-VM/ progress) libguestfs: closing guestfs handle 0x59cfcf2d9380 (state 0)
2025-09-03 07:13:33,158 WARN  [resource.wrapper.LibvirtConvertInstanceCommandWrapper] (AgentRequest-Handler-3:[]) (logid:) Execution of process [147579] for command [virt-v2v --root first -i ova /mnt/f16f10e2-5272-3087-b0e3-bf664ec5b296/64beae76-59f2-4b30-a82c-48d7fd3869cb/i-2-20-VM/ -o local -os /mnt/f16f10e2-5272-3087-b0e3-bf664ec5b296 -of qcow2 -on dafb4cb1-8caa-4fe9-990b-605aeb615f96 -v ] failed.
2025-09-03 07:13:33,158 DEBUG [resource.wrapper.LibvirtConvertInstanceCommandWrapper] (AgentRequest-Handler-3:[]) (logid:) Exit value of process [147579] for command [virt-v2v --root first -i ova /mnt/f16f10e2-5272-3087-b0e3-bf664ec5b296/64beae76-59f2-4b30-a82c-48d7fd3869cb/i-2-20-VM/ -o local -os /mnt/f16f10e2-5272-3087-b0e3-bf664ec5b296 -of qcow2 -on dafb4cb1-8caa-4fe9-990b-605aeb615f96 -v ] is [1].
2025-09-03 07:13:33,159 WARN  [resource.wrapper.LibvirtConvertInstanceCommandWrapper] (AgentRequest-Handler-3:[]) (logid:) Exception [Stream closed] occurred when attempting to run command [virt-v2v --root first -i ova /mnt/f16f10e2-5272-3087-b0e3-bf664ec5b296/64beae76-59f2-4b30-a82c-48d7fd3869cb/i-2-20-VM/ -o local -os /mnt/f16f10e2-5272-3087-b0e3-bf664ec5b296 -of qcow2 -on dafb4cb1-8caa-4fe9-990b-605aeb615f96 -v ]. java.io.IOException: Stream closed
        at java.base/java.io.BufferedInputStream.getBufIfOpen(BufferedInputStream.java:168)
        at java.base/java.io.BufferedInputStream.read(BufferedInputStream.java:334)
        at java.base/sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:287)
        at java.base/sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:330)
        at java.base/sun.nio.cs.StreamDecoder.read(StreamDecoder.java:190)
        at java.base/java.io.InputStreamReader.read(InputStreamReader.java:177)
        at java.base/java.io.BufferedReader.fill(BufferedReader.java:162)
        at java.base/java.io.BufferedReader.readLine(BufferedReader.java:329)
        at java.base/java.io.BufferedReader.readLine(BufferedReader.java:396)
        at com.cloud.utils.script.OutputInterpreter.processError(OutputInterpreter.java:41)
        at com.cloud.utils.script.Script.execute(Script.java:305)
        at com.cloud.hypervisor.kvm.resource.wrapper.LibvirtConvertInstanceCommandWrapper.performInstanceConversion(LibvirtConvertInstanceCommandWrapper.java:410)
        at com.cloud.hypervisor.kvm.resource.wrapper.LibvirtConvertInstanceCommandWrapper.execute(LibvirtConvertInstanceCommandWrapper.java:134)
        at com.cloud.hypervisor.kvm.resource.wrapper.LibvirtConvertInstanceCommandWrapper.execute(LibvirtConvertInstanceCommandWrapper.java:61)
        at com.cloud.hypervisor.kvm.resource.wrapper.LibvirtRequestWrapper.execute(LibvirtRequestWrapper.java:78)
        at com.cloud.hypervisor.kvm.resource.LibvirtComputingResource.executeRequest(LibvirtComputingResource.java:1958)
        at com.cloud.agent.Agent.processRequest(Agent.java:779)
        at com.cloud.agent.Agent$AgentRequestHandler.doTask(Agent.java:1194)
        at com.cloud.utils.nio.Task.call(Task.java:83)
        at com.cloud.utils.nio.Task.call(Task.java:29)
        at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base/java.lang.Thread.run(Thread.java:840)

2025-09-03 07:13:33,159 ERROR [resource.wrapper.LibvirtConvertInstanceCommandWrapper] (AgentRequest-Handler-3:[]) (logid:) The virt-v2v conversion for the OVF 64beae76-59f2-4b30-a82c-48d7fd3869cb failed. Please check the agent logs for the virt-v2v output. Please try on a different kvm host which has a different virt-v2v version.
2025-09-03 07:13:33,159 DEBUG [resource.wrapper.LibvirtConvertInstanceCommandWrapper] (AgentRequest-Handler-3:[]) (logid:) Cleaning up exported OVA at dir /mnt/f16f10e2-5272-3087-b0e3-bf664ec5b296/64beae76-59f2-4b30-a82c-48d7fd3869cb
2025-09-03 07:13:34,556 DEBUG [cloud.utils.FileUtil] (AgentRequest-Handler-3:[]) (logid:) Deleted path: /mnt/f16f10e2-5272-3087-b0e3-bf664ec5b296/64beae76-59f2-4b30-a82c-48d7fd3869cb
2025-09-03 07:13:34,560 DEBUG [cloud.agent.Agent] (AgentRequest-Handler-3:[]) (logid:) Seq 1-6541196983778934803:  { Ans: , MgmtId: 32988905606098, via: 1, Ver: v1, Flags: 10, [{"com.cloud.agent.api.ConvertInstanceAnswer":{"result":"false","details":"The virt-v2v conversion for the OVF 64beae76-59f2-4b30-a82c-48d7fd3869cb failed. Please check the agent logs for the virt-v2v output. Please try on a different kvm host which has a different virt-v2v version.","wait":"0","bypassHostMaintenance":"false"}}] }
2025-09-03 07:13:47,347 DEBUG [kvm.resource.LibvirtComputingResource] (AgentOutRequest-Handler-5:[]) (logid:) Executing command [/usr/share/cloudstack-common/scripts/vm/network/security_group.py get_rule_logs_for_vms ].

management.log:

    2025-09-03 07:13:34,563 DEBUG [c.c.a.t.Request] (API-Job-Executor-1:[ctx-cec4f83b, job-2264, ctx-1e7ba725]) (logid:8f3df440) Seq 1-6541196983778934803: Received:  { Ans: , MgmtId: 32988905606098, via: 1(ref-trl-5934-k-Mu24-alex-mattioli-kvm1), Ver: v1, Flags: 10, { ConvertInstanceAnswer } }
2025-09-03 07:13:34,564 ERROR [o.a.c.v.UnmanagedVMsManagerImpl] (API-Job-Executor-1:[ctx-cec4f83b, job-2264, ctx-1e7ba725]) (logid:8f3df440) The convert process failed for instance i-2-20-VM from VMware to KVM on host Host {"id":1,"name":"ref-trl-5934-k-Mu24-alex-mattioli-kvm1","type":"Routing","uuid":"8f8083bd-23c4-4533-ac80-ff02c46a6bb3"}: The virt-v2v conversion for the OVF 64beae76-59f2-4b30-a82c-48d7fd3869cb failed. Please check the agent logs for the virt-v2v output. Please try on a different kvm host which has a different virt-v2v version.
2025-09-03 07:13:34,564 ERROR [o.a.c.v.UnmanagedVMsManagerImpl] (API-Job-Executor-1:[ctx-cec4f83b, job-2264, ctx-1e7ba725]) (logid:8f3df440) Error importing VM: The convert process failed for instance i-2-20-VM from VMware to KVM on host Host {"id":1,"name":"ref-trl-5934-k-Mu24-alex-mattioli-kvm1","type":"Routing","uuid":"8f8083bd-23c4-4533-ac80-ff02c46a6bb3"}: The virt-v2v conversion for the OVF 64beae76-59f2-4b30-a82c-48d7fd3869cb failed. Please check the agent logs for the virt-v2v output. Please try on a different kvm host which has a different virt-v2v version. com.cloud.utils.exception.CloudRuntimeException: The convert process failed for instance i-2-20-VM from VMware to KVM on host Host {"id":1,"name":"ref-trl-5934-k-Mu24-alex-mattioli-kvm1","type":"Routing","uuid":"8f8083bd-23c4-4533-ac80-ff02c46a6bb3"}: The virt-v2v conversion for the OVF 64beae76-59f2-4b30-a82c-48d7fd3869cb failed. Please check the agent logs for the virt-v2v output. Please try on a different kvm host which has a different virt-v2v version.
        at org.apache.cloudstack.vm.UnmanagedVMsManagerImpl.convertAndImportToKVM(UnmanagedVMsManagerImpl.java:2033)
        at org.apache.cloudstack.vm.UnmanagedVMsManagerImpl.convertVmwareInstanceToKVMAfterExportingOVFToConvertLocation(UnmanagedVMsManagerImpl.java:2010)
        at org.apache.cloudstack.vm.UnmanagedVMsManagerImpl.importUnmanagedInstanceFromVmwareToKvm(UnmanagedVMsManagerImpl.java:1676)
        at org.apache.cloudstack.vm.UnmanagedVMsManagerImpl.baseImportInstance(UnmanagedVMsManagerImpl.java:1386)
        at org.apache.cloudstack.vm.UnmanagedVMsManagerImpl.importVm(UnmanagedVMsManagerImpl.java:1507)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:569)
        at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:344)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:198)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
        at org.apache.cloudstack.network.contrail.management.EventUtils$EventInterceptor.invoke(EventUtils.java:105)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:175)
        at com.cloud.event.ActionEventInterceptor.invoke(ActionEventInterceptor.java:52)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:175)
        at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:97)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
        at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:215)
        at jdk.proxy3/jdk.proxy3.$Proxy514.importVm(Unknown Source)
        at org.apache.cloudstack.api.command.admin.vm.ImportVmCmd.execute(ImportVmCmd.java:269)
        at com.cloud.api.ApiDispatcher.dispatch(ApiDispatcher.java:173)
        at com.cloud.api.ApiAsyncJobDispatcher.runJob(ApiAsyncJobDispatcher.java:110)
        at org.apache.cloudstack.framework.jobs.impl.AsyncJobManagerImpl$5.runInContext(AsyncJobManagerImpl.java:652)
        at org.apache.cloudstack.managed.context.ManagedContextRunnable$1.run(ManagedContextRunnable.java:49)
        at org.apache.cloudstack.managed.context.impl.DefaultManagedContext$1.call(DefaultManagedContext.java:56)
        at org.apache.cloudstack.managed.context.impl.DefaultManagedContext.callWithContext(DefaultManagedContext.java:103)
        at org.apache.cloudstack.managed.context.impl.DefaultManagedContext.runWithContext(DefaultManagedContext.java:53)
        at org.apache.cloudstack.managed.context.ManagedContextRunnable.run(ManagedContextRunnable.java:46)
        at org.apache.cloudstack.framework.jobs.impl.AsyncJobManagerImpl$5.run(AsyncJobManagerImpl.java:600)
        at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
        at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base/java.lang.Thread.run(Thread.java:840)
2025-09-03 07:13:34,580 WARN  [o.a.c.m.w.WebhookServiceImpl] (API-Job-Executor-1:[ctx-cec4f83b, job-2264, ctx-1e7ba725]) (logid:8f3df440) Skipping delivering event Event {"description":"{\"event\":\"VM.IMPORT\",\"status\":\"Completed\"}","eventId":null,"eventType":"VM.IMPORT","eventUuid":null,"resourceType":"VirtualMachine","resourceUUID":null} to any webhook as account ID is missing
2025-09-03 07:13:34,580 WARN  [o.a.c.f.e.EventDistributorImpl] (API-Job-Executor-1:[ctx-cec4f83b, job-2264, ctx-1e7ba725]) (logid:8f3df440) Failed to publish event [category: ActionEvent, type: VM.IMPORT] on bus webhookEventBus
2025-09-03 07:13:34,595 DEBUG [o.a.c.f.j.i.AsyncJobManagerImpl] (API-Job-Executor-1:[ctx-cec4f83b, job-2264]) (logid:8f3df440) Complete async job-2264, jobStatus: FAILED, resultCode: 530, result: org.apache.cloudstack.api.response.ExceptionResponse/null/{"uuidList":[],"errorcode":"530","errortext":"The convert process failed for instance i-2-20-VM from VMware to KVM on host Host {"id":1,"name":"ref-trl-5934-k-Mu24-alex-mattioli-kvm1","type":"Routing","uuid":"8f8083bd-23c4-4533-ac80-ff02c46a6bb3"}: The virt-v2v conversion for the OVF 64beae76-59f2-4b30-a82c-48d7fd3869cb failed. Please check the agent logs for the virt-v2v output. Please try on a different kvm host which has a different virt-v2v version."}
2025-09-03 07:13:34,596 DEBUG [o.a.c.f.j.i.AsyncJobManagerImpl] (API-Job-Executor-1:[ctx-cec4f83b, job-2264]) (logid:8f3df440) Publish async job-2264 complete on message bus

[ingox]

Installed a EL9 now, but same error: The virt-v2v conversion for the OVF 1688250f-6d4d-4f49-8cd9-aac038e053bf failed. Please check the agent logs for the virt-v2v output. Please try on a different kvm host which has a different virt-v2v version.

Here are my versions:
OS:
5.14.0-362.18.1.el9_3.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Jan 24 23:11:18 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux

Virt-v2v:
virt-v2v 2.7.1rhel=9,release=10.el9_6

Ovftool:
VMware ovftool 5.0.0 (build-24781994)

Linux works. I'm having issues with Windows guests only.

2025-09-08 13:35:08,354 WARN [resource.wrapper.LibvirtConvertInstanceCommandWrapper] (AgentRequest-Handler-2:[]) (logid:) Exception [Stream closed] occurred when attempting to run command [virt-v2v --root first -i ova /mnt/8132f3c3-13b6-370b-a00b-2f2e69a323e0/1688250f-6d4d-4f49-8cd9-aac038e053bf/i-2-20-VM/ -o local -os /mnt/8132f3c3-13b6-370b-a00b-2f2e69a323e0 -of qcow2 -on 4e631218-18d6-4e21-afcd-3b010c4d7052 ]. java.io.IOException: Stream closed
at java.base/java.io.BufferedInputStream.getBufIfOpen(BufferedInputStream.java:168)
at java.base/java.io.BufferedInputStream.read(BufferedInputStream.java:334)
at java.base/sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:287)
at java.base/sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:330)
at java.base/sun.nio.cs.StreamDecoder.read(StreamDecoder.java:190)
at java.base/java.io.InputStreamReader.read(InputStreamReader.java:177)
at java.base/java.io.BufferedReader.fill(BufferedReader.java:162)
at java.base/java.io.BufferedReader.readLine(BufferedReader.java:329)
at java.base/java.io.BufferedReader.readLine(BufferedReader.java:396)
at com.cloud.utils.script.OutputInterpreter.processError(OutputInterpreter.java:41)
at com.cloud.utils.script.Script.execute(Script.java:305)
at com.cloud.hypervisor.kvm.resource.wrapper.LibvirtConvertInstanceCommandWrapper.performInstanceConversion(LibvirtConvertInstanceCommandWrapper.java:410)
at com.cloud.hypervisor.kvm.resource.wrapper.LibvirtConvertInstanceCommandWrapper.execute(LibvirtConvertInstanceCommandWrapper.java:134)
at com.cloud.hypervisor.kvm.resource.wrapper.LibvirtConvertInstanceCommandWrapper.execute(LibvirtConvertInstanceCommandWrapper.java:61)
at com.cloud.hypervisor.kvm.resource.wrapper.LibvirtRequestWrapper.execute(LibvirtRequestWrapper.java:78)
at com.cloud.hypervisor.kvm.resource.LibvirtComputingResource.executeRequest(LibvirtComputingResource.java:1958)
at com.cloud.agent.Agent.processRequest(Agent.java:779)
at com.cloud.agent.Agent$AgentRequestHandler.doTask(Agent.java:1194)
at com.cloud.utils.nio.Task.call(Task.java:83)
at com.cloud.utils.nio.Task.call(Task.java:29)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.lang.Thread.run(Thread.java:840)

2025-09-08 13:35:08,355 ERROR [resource.wrapper.LibvirtConvertInstanceCommandWrapper] (AgentRequest-Handler-2:[]) (logid:) The virt-v2v conversion for the OVF 1688250f-6d4d-4f49-8cd9-aac038e053bf failed. Please check the agent logs for the virt-v2v output. Please try on a different kvm host which has a different virt-v2v version.

[nvazquez]

Hi @ingox can you upload the entire agent.log? It seems like the failure is coming from the virt-v2v binary, the agent.log should log the execution logs so probably we can see why it is failing

[ingox]

cloudstack-agent.txt

@nvazquez This is the agent.log from the time I started the process until it did crash.

[nvazquez]

Thanks @ingox - I can see the virt-v2v execution fails with this error about read only file system:

2025-09-19 20:29:15,109 INFO  [resource.wrapper.LibvirtConvertInstanceCommandWrapper] (Script-6:[]) (logid:) (virt-v2v ovf source: /mnt/f16f10e2-5272-3087-b0e3-bf664ec5b296/4b652d79-7b7a-4108-a873-ff16fb7365f9/i-2-20-VM/ progress) Falling back to read-only mount because the NTFS partition is in an
2025-09-19 20:29:15,111 INFO  [resource.wrapper.LibvirtConvertInstanceCommandWrapper] (Script-6:[]) (logid:) (virt-v2v ovf source: /mnt/f16f10e2-5272-3087-b0e3-bf664ec5b296/4b652d79-7b7a-4108-a873-ff16fb7365f9/i-2-20-VM/ progress) unsafe state. Please resume and shutdown Windows fully (no hibernation
2025-09-19 20:29:15,111 INFO  [resource.wrapper.LibvirtConvertInstanceCommandWrapper] (Script-6:[]) (logid:) (virt-v2v ovf source: /mnt/f16f10e2-5272-3087-b0e3-bf664ec5b296/4b652d79-7b7a-4108-a873-ff16fb7365f9/i-2-20-VM/ progress) or fast restarting.)
2025-09-19 20:29:15,112 INFO  [resource.wrapper.LibvirtConvertInstanceCommandWrapper] (Script-6:[]) (logid:) (virt-v2v ovf source: /mnt/f16f10e2-5272-3087-b0e3-bf664ec5b296/4b652d79-7b7a-4108-a873-ff16fb7365f9/i-2-20-VM/ progress) Could not mount read-write, trying read-only
2025-09-19 20:29:15,113 INFO  [resource.wrapper.LibvirtConvertInstanceCommandWrapper] (Script-6:[]) (logid:) (virt-v2v ovf source: /mnt/f16f10e2-5272-3087-b0e3-bf664ec5b296/4b652d79-7b7a-4108-a873-ff16fb7365f9/i-2-20-VM/ progress) guestfsd: => mount (0x1) took 0.04 secs
2025-09-19 20:29:15,114 INFO  [resource.wrapper.LibvirtConvertInstanceCommandWrapper] (Script-6:[]) (logid:) (virt-v2v ovf source: /mnt/f16f10e2-5272-3087-b0e3-bf664ec5b296/4b652d79-7b7a-4108-a873-ff16fb7365f9/i-2-20-VM/ progress) guestfsd: <= touch (0x3) request length 56 bytes
2025-09-19 20:29:15,115 INFO  [resource.wrapper.LibvirtConvertInstanceCommandWrapper] (Script-6:[]) (logid:) (virt-v2v ovf source: /mnt/f16f10e2-5272-3087-b0e3-bf664ec5b296/4b652d79-7b7a-4108-a873-ff16fb7365f9/i-2-20-VM/ progress) guestfsd: error: open: /azw3p6uu: Read-only file system
2025-09-19 20:29:15,115 INFO  [resource.wrapper.LibvirtConvertInstanceCommandWrapper] (Script-6:[]) (logid:) (virt-v2v ovf source: /mnt/f16f10e2-5272-3087-b0e3-bf664ec5b296/4b652d79-7b7a-4108-a873-ff16fb7365f9/i-2-20-VM/ progress) guestfsd: => touch (0x3) took 0.00 secs
2025-09-19 20:29:15,115 INFO  [resource.wrapper.LibvirtConvertInstanceCommandWrapper] (Script-6:[]) (logid:) (virt-v2v ovf source: /mnt/f16f10e2-5272-3087-b0e3-bf664ec5b296/4b652d79-7b7a-4108-a873-ff16fb7365f9/i-2-20-VM/ progress) virt-v2v: error: filesystem was mounted read-only, even though we asked for it to be mounted read-write.  This usually means that the filesystem was not cleanly unmounted.  Possible causes include trying to convert a guest which is running, or using Windows Hibernation or Fast Restart.
2025-09-19 20:29:15,115 INFO  [resource.wrapper.LibvirtConvertInstanceCommandWrapper] (Script-6:[]) (logid:) (virt-v2v ovf source: /mnt/f16f10e2-5272-3087-b0e3-bf664ec5b296/4b652d79-7b7a-4108-a873-ff16fb7365f9/i-2-20-VM/ progress) 
2025-09-19 20:29:15,115 INFO  [resource.wrapper.LibvirtConvertInstanceCommandWrapper] (Script-6:[]) (logid:) (virt-v2v ovf source: /mnt/f16f10e2-5272-3087-b0e3-bf664ec5b296/4b652d79-7b7a-4108-a873-ff16fb7365f9/i-2-20-VM/ progress) Original error message: touch: open: /azw3p6uu: Read-only file system

Can you try doing a graceful shutdown of the Windows VM and then retrying the migration?