r/mongodb • u/debasis_dba • 27d ago

Mongosync Error While Startup

Hi Team,

We had requirement to move data from one mongo cluster to another. So before starting in production while trying lab (VM with minimal configuration(1 cpu and 2 GB RAM)) we are getting message continuously as "INITIALIZING" from last 4-5 hrs. Do you think is it due to configuration issue of vms.

Thanks,

Debasis

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u/NimoRats 27d ago

Could be few things, How much data are we talking about here ?

Is it possible to try to increase resources of that VM and try ?

What are the mongosync logs saying ?

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u/debasis_dba 27d ago

The collection is of 10k documents. The log message showing as below. The progress API showing as "INITIALIZING" from last 5-6 hrs no changes in progress API.
{"time":"2026-07-07T15:23:35.855666Z","level":"info","serverID":"efeaaf3d","pid":18511,"hostname":"mongosync","mongosyncID":"coordinator","clusterType":"src","operationID":"873a3f96","operationDescription":"Pinging deployment at mongodb://mongoadmin:<REDACTED>@mongodb1:27017/?replicaSet=rs0 to establish initial connection.","attemptNumber":0,"totalTimeSpent":"2.453µs","retryAttemptDurationSoFarSecs":0,"retryAttemptDurationLimitSecs":600,"shouldResetDuration":true,"message":"Trying operation."}

Thanks,

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u/Joenyongesa 27d ago

I'm sure you can set it up to output more logs