OtterMind/Chat2DB · error · BusinessException
mongodb count error
mongodb count error
Error message
mongodb count error
What it means
Thrown by the static getCountOfMongodb when a RuntimeException occurs while building and executing an executeSelectTable command to count rows in a MongoDB collection. It wraps the exception with the tableName and the original message. This is a MongoDB-specific count fallback that loads the table and reads dataList size rather than issuing a count command.
Source
Thrown at chat2db-community-server/chat2db-community-domain/chat2db-community-domain-core/src/main/java/ai/chat2db/community/domain/core/impl/db/DbDlTemplateServiceImpl.java:348
}
} catch (Exception e) {
log.error("executeUpdate error", e);
throw new BusinessException("connection error", new Object[]{e.getMessage()}, e);
}
return executeResult;
}
static Long getCountOfMongodb(String tableName, ICommandExecutor executor) {
try {
SqlExecuteRequest command = new SqlExecuteRequest();
command.setTableName(tableName);
List<ExecuteResponse> results = executor.executeSelectTable(command);
if (CollectionUtils.isEmpty(results)) {
return 0L;
}
return (long) CollectionUtils.size(results.get(0).getDataList());
} catch (RuntimeException e) {
throw new BusinessException("mongodb count error", new Object[]{tableName, e.getMessage()}, e);
}
}
}
View on GitHub (pinned to 5ee1e990e7)
Solutions
- Verify the collection (tableName) exists in the MongoDB database.
- Inspect the chained cause for the MongoDB driver error.
- Check connection health and read permissions.
- For very large collections, note this implementation loads all rows to count — consider a native count command if performance is an issue.
Defensive patterns
Strategy: try-catch
Try / catch
try {
Long total = service.count(req);
} catch (BusinessException e) {
if ("mongodb count error".equals(e.getCode())) {
Object[] args = e.getArgs(); // [tableName, message]
// verify collection exists; inspect e.getCause()
} else { throw e; }
} Prevention
- Verify the MongoDB collection exists before counting.
- Note this implementation loads all rows to count — avoid on huge collections.
- Check read permissions on the collection.
When it happens
Trigger: Calling count() on a MongoDB datasource (getCountOfMongodb path) where executor.executeSelectTable(command) throws a RuntimeException — collection doesn't exist, connection lost, driver error, or the response is malformed.
Common situations: MongoDB collection name typo or already dropped; connection dropped; permissions to read the collection missing; very large collection where loading all rows fails (memory/timeout).
Related errors
AI-assisted analysis of OtterMind/Chat2DB@5ee1e990e7 (2026-08-14).
Data as JSON: /api/errors/31e02898f6524d64.
Report an issue: GitHub.