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我在我的gradle依賴列表中包含了cassandra-all。下面是它：Cassandra-all依賴失敗
compile 'org.apache.cassandra:cassandra-all:2.1.0-beta2'
但是，當我試圖打造，它與以下異常失敗：
> Could not find ch.qos.logback:logback-classic:1.1.12.
Required by:
MAPro_Transactor:mapro-commons:1.0
MAPro_Transactor:mapro-commons:1.0 > com.adaequare.mapro.model:mapro-model:2.0-SNAPSHOT
> Could not find io.netty:netty:4.0.17.Final.
Required by:
MAPro_Transactor:mapro-commons:1.0 > com.datastax.cassandra:cassandra-driver-core:2.0.1
> Could not find ch.qos.logback:logback-core:1.1.12.
Required by:
MAPro_Transactor:mapro-commons:1.0 > org.apache.cassandra:cassandra-all:2.1.0-beta2
> Could not find ch.qos.logback:logback-classic:1.1.12.
Required by:
MAPro_Transactor:mapro-commons:1.0 > org.apache.cassandra:cassandra-all:2.1.0-beta2
> Could not find com.github.stephenc:jamm:0.2.6.
Required by:
MAPro_Transactor:mapro-commons:1.0 > org.apache.cassandra:cassandra-all:2.1.0-beta2
> Could not find io.netty:netty:4.0.17.Final.
Required by:
MAPro_Transactor:mapro-commons:1.0 > org.apache.cassandra:cassandra-all:2.1.0-beta2
我看到的依賴關係是不是在Maven倉庫確實存在。以爲我會去該網站，手動下載罐子並將其放入Maven本地存儲庫。但是我找不到com.github.stephenc：jamm：0.2.6 jar。還有其他人面臨同樣的問題嗎？請建議如何前進。