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org.apache.http.ConnectionClosedException: Connection closed	at org.apache.http.impl.nio.client.AbstractClientExchangeHandler.connectionAllocated(AbstractClientExchangeHandler.java:320)	at org.apache.http.impl.nio.client.AbstractClientExchangeHandler.access$000(AbstractClientExchangeHandler.java:62)	at org.apache.http.impl.nio.client.AbstractClientExchangeHandler$1.completed(AbstractClientExchangeHandler.java:373)	at org.apache.http.impl.nio.client.AbstractClientExchangeHandler$1.completed(AbstractClientExchangeHandler.java:369)	at org.apache.http.concurrent.BasicFuture.completed(BasicFuture.java:119)	at org.apache.http.impl.nio.conn.PoolingNHttpClientConnectionManager$InternalPoolEntryCallback.completed(PoolingNHttpClientConnectionManager.java:494)	at org.apache.http.impl.nio.conn.PoolingNHttpClientConnectionManager$InternalPoolEntryCallback.completed(PoolingNHttpClientConnectionManager.java:477)	at org.apache.http.concurrent.BasicFuture.completed(BasicFuture.java:119)	at org.apache.http.nio.pool.AbstractNIOConnPool.fireCallbacks(AbstractNIOConnPool.java:456)	at org.apache.http.nio.pool.AbstractNIOConnPool.lease(AbstractNIOConnPool.java:286)	at org.apache.http.impl.nio.conn.PoolingNHttpClientConnectionManager.requestConnection(PoolingNHttpClientConnectionManager.java:266)	at org.apache.http.impl.nio.client.AbstractClientExchangeHandler.requestConnection(AbstractClientExchangeHandler.java:363)