Can't unmount dmg. Keep getting "Resource Busy"

Question

I have a Kotlin data class that is serialised to JSON in a Spring Boot project. I'd like to customise how date is formatted when serialising to JSON. The name of the field should be serialised using default rules. That expresses what I'd like to do:

class ZonedDateTimeSerialiser : JsonSerializer<ZonedDateTime>() {
    @Throws(IOException::class)
    fun serialize(value: ZonedDateTime, gen: JsonGenerator, serializers: SerializerProvider?) {
        val parseDate: String? = value.withZoneSameInstant(ZoneId.of("Europe/Warsaw"))
        .withZoneSameLocal(ZoneOffset.UTC)
            .format(DateTimeFormatter.ISO_DATE_TIME)
        gen.writeString(parseDate)
    }
}

data class OrderNotesRequest(
    @JsonSerialize(using = ZonedDateTimeSerialiser::class)
    val date: ZonedDateTime = ZonedDateTime.now()
)

But I get a type error:

Type mismatch.
Required:
KClass<out (JsonSerializer<Any!>..JsonSerializer<*>?)>
Found:
KClass<ZonedDateTimeSerialzier>

I did try switching the parameter to annotation to contentUsing but the type error remained the same.

Solution 1

You can use following command to force unmount it:

hdiutil unmount /Volumes/Workspace -force

Use detach command can help to unmount and then eject the disk if you want.

If the above command reports following error message:

hdiutil: detach failed - No such file or director

It means the path is incorrect, you can use /Volumes/Workspace/* instead.

Solution 2

It is safe to kill or Force Quit the mds process, and if you have disabled spotlight indexing then it shouldn't start up again.