java.lang.IllegalArgumentException: state should be: w >= 0

[Geoffrey Knauth]

I'm fairly new to Casbah.  I'm using:

libraryDependencies += "org.mongodb" % "casbah_2.11" % "2.8.2"

libraryDependencies += "org.mongodb" % "mongo-java-driver" % "3.0.3"

This line in my code:

val mongoClient = MongoClient(uri)

causes:

Exception in thread "main" java.lang.ExceptionInInitializerError
	at com.mongodb.casbah.BaseImports$class.$init$(Implicits.scala:162)
	at com.mongodb.casbah.Imports$.<init>(Implicits.scala:142)
	at com.mongodb.casbah.Imports$.<clinit>(Implicits.scala)
        at myprogram.Main$.setupMongoOutput(Main.scala:34)
        ...
Caused by: java.lang.IllegalArgumentException: state should be: w >= 0
	at com.mongodb.assertions.Assertions.isTrueArgument(Assertions.java:99)
	at com.mongodb.WriteConcern.<init>(WriteConcern.java:253)
	at com.mongodb.WriteConcern.<init>(WriteConcern.java:231)
	at com.mongodb.WriteConcern.<init>(WriteConcern.java:182)
	at com.mongodb.casbah.WriteConcern$.<init>(WriteConcern.scala:41)
	at com.mongodb.casbah.WriteConcern$.<clinit>(WriteConcern.scala)

What I am doing wrong?  I get this error even for a simple:  val mongoClient = MongoClient()

Thanks,
Geoff

[Ross Lawley]

Hi Geoff,

Casbah currently relies on the 2.13.x version of the mongo java driver and is not compatible with 3.0.x

All its dependencies are listed in the pom.xml so just adding Casbah should suffice:

libraryDependencies += "org.mongodb" % "casbah_2.11" % "2.8.2"

Ross

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