What is preferred location to the Azure Cosmos DB Emulator?

Purnima Sahu 1

ConnectionPolicy defaultPolicy = ConnectionPolicy.getDefaultPolicy();
defaultPolicy.setUserAgentSuffix("CosmosDBJavaQuickstart");
defaultPolicy.setPreferredLocations(Lists.newArrayList("_____________________"));

Please help me set preferred location for local emulator of cosmos db.

Anurag Sharma 17,566 Reputation points

2020-07-30T16:30:38.043+00:00

Hi @PurnimaSahu-9867, Azure Cosmos DB runs locally on your machine and hence there is no need to specify preferred location for it. Please read through the below statement.

In order to take advantage of global distribution, client applications can specify the ordered preference list of regions to be used to perform document operations. Based on the Azure Cosmos DB account configuration, the most optimal endpoint will be chosen by the SDK to perform write and read operations.

The Azure Cosmos Emulator provides a local environment that emulates the Azure Cosmos DB service for development purposes. Using the Azure Cosmos Emulator, you can develop and test your application locally, without creating an Azure subscription or incurring any costs.

For more details, please Refer to this link.

Could you please let us know your problem statement, we would be glad to help you out here.
Purnima Sahu 1 Reputation point

2020-07-30T16:47:32.543+00:00

Using Azure Cosmos DB endpoint: https://localhost:8081/
java.lang.IllegalArgumentException: port out of range:-1
at java.net.InetSocketAddress.checkPort(Unknown Source)
at java.net.InetSocketAddress.<init>(Unknown Source)
at reactor.netty.tcp.InetSocketAddressUtil.createForIpString(InetSocketAddressUtil.java:88)
at reactor.netty.tcp.InetSocketAddressUtil.createInetSocketAddress(InetSocketAddressUtil.java:74)
at reactor.netty.tcp.InetSocketAddressUtil.createUnresolved(InetSocketAddressUtil.java:48)
at reactor.netty.tcp.TcpUtils._updatePort(TcpUtils.java:93)
at reactor.netty.tcp.TcpUtils.updatePort(TcpUtils.java:75)
at reactor.netty.tcp.TcpClient.lambda$port$5(TcpClient.java:394)
at reactor.netty.tcp.TcpClientBootstrap.configure(TcpClientBootstrap.java:39)
Purnima Sahu 1 Reputation point

2020-07-30T16:48:37.377+00:00

Getting error each time
java.lang.IllegalArgumentException: port out of range:-1
Purnima Sahu 1 Reputation point

2020-07-30T16:53:38.73+00:00

Using Azure Cosmos DB endpoint: https://localhost:8081/
reactor.core.Exceptions$ReactiveException: java.net.UnknownHostException: localhost-WestUS

1 answer

Anurag Sharma 17,566 Reputation points

2020-08-03T09:08:47.497+00:00

Hi @Purnima Sahu , the error you are facing is because of assignment of Preferred location in below line of code.
defaultPolicy.setPreferredLocations(Lists.newArrayList("_"));

This code piece is needed only when we connect with Azure portal, but it is not needed in case of Azure Cosmos Db emulator. Could you please remove this code line and run the project again?

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Deshpande, Vinayak (623) 0 Reputation points

2023-10-04T15:53:09.04+00:00

this didnt resolved issue for me
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