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正常启动后 过了一段时间

java.util.concurrent.ExecutionException: io.grpc.StatusRuntimeException: UNAVAILABLE: io exception at com.google.common.util.concurrent.AbstractFuture.getDoneValue(AbstractFuture.java:531) ~[guava-26.0-android.jar:na] at com.google.common.util.concurrent.AbstractFuture.get(AbstractFuture.java:423) ~[guava-26.0-android.jar:na] at org.chainmaker.sdk.ChainClient.sendTxRequest(ChainClient.java:1918) [chainmaker-sdk-java-2.2.0.jar:na] at org.chainmaker.sdk.ChainClient.sendRequest(ChainClient.java:2070) [chainmaker-sdk-java-2.2.0.jar:na] at org.chainmaker.sdk.ChainClient.proposalRequest(ChainClient.java:2047) [chainmaker-sdk-java-2.2.0.jar:na] at org.chainmaker.sdk.ChainClient.getChainConfig(ChainClient.java:812) [chainmaker-sdk-java-2.2.0.jar:na] at chainmaker.sdk.demo.ChainConfig.getChainConfig(ChainConfig.java:11) [classes/:na] at chainmaker.sdk.demo.DemoApplication.main(DemoApplication.java:16) [classes/:na] Caused by: io.grpc.StatusRuntimeException: UNAVAILABLE: io exception at io.grpc.Status.asRuntimeException(Status.java:533) ~[grpc-api-1.23.0.jar:1.23.0] at io.grpc.stub.ClientCalls$UnaryStreamToFuture.onClose(ClientCalls.java:490) ~[grpc-stub-1.23.0.jar:1.23.0] at io.grpc.PartialForwardingClientCallListener.onClose(PartialForwardingClientCallListener.java:39) ~[grpc-api-1.23.0.jar:1.23.0] at io.grpc.ForwardingClientCallListener.onClose(ForwardingClientCallListener.java:23) ~[grpc-api-1.23.0.jar:1.23.0] at io.grpc.ForwardingClientCallListener$SimpleForwardingClientCallListener.onClose(ForwardingClientCallListener.java:40) ~[grpc-api-1.23.0.jar:1.23.0] at io.grpc.internal.CensusStatsModule$StatsClientInterceptor$1$1.onClose(CensusStatsModule.java:700) ~[grpc-core-1.23.0.jar:1.23.0] at io.grpc.PartialForwardingClientCallListener.onClose(PartialForwardingClientCallListener.java:39) ~[grpc-api-1.23.0.jar:1.23.0] at io.grpc.ForwardingClientCallListener.onClose(ForwardingClientCallListener.java:23) ~[grpc-api-1.23.0.jar:1.23.0] at io.grpc.ForwardingClientCallListener$SimpleForwardingClientCallListener.onClose(ForwardingClientCallListener.java:40) ~[grpc-api-1.23.0.jar:1.23.0] at io.grpc.internal.CensusTracingModule$TracingClientInterceptor$1$1.onClose(CensusTracingModule.java:399) ~[grpc-core-1.23.0.jar:1.23.0] at io.grpc.internal.ClientCallImpl.closeObserver(ClientCallImpl.java:510) ~[grpc-core-1.23.0.jar:1.23.0] at io.grpc.internal.ClientCallImpl.access$300(ClientCallImpl.java:66) ~[grpc-core-1.23.0.jar:1.23.0] at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl.close(ClientCallImpl.java:630) ~[grpc-core-1.23.0.jar:1.23.0] at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl.access$700(ClientCallImpl.java:518) ~[grpc-core-1.23.0.jar:1.23.0] at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInternal(ClientCallImpl.java:692) ~[grpc-core-1.23.0.jar:1.23.0] at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInContext(ClientCallImpl.java:681) ~[grpc-core-1.23.0.jar:1.23.0] at io.grpc.internal.ContextRunnable.run(ContextRunnable.java:37) ~[grpc-core-1.23.0.jar:1.23.0] at io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:123) ~[grpc-core-1.23.0.jar:1.23.0] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) ~[na:1.8.0_161] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) ~[na:1.8.0_161] at java.lang.Thread.run(Thread.java:748) ~[na:1.8.0_161] Caused by: io.netty.channel.AbstractChannel$AnnotatedConnectException: Connection timed out: no further information: /43.139.134.91:12302 Caused by: java.net.ConnectException: Connection timed out: no further information at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) ~[na:1.8.0_161] at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717) ~[na:1.8.0_161] at io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocketChannel.java:330) ~[netty-transport-4.1.68.Final.jar:4.1.68.Final] at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:334) ~[netty-transport-4.1.68.Final.jar:4.1.68.Final] at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:707) ~[netty-transport-4.1.68.Final.jar:4.1.68.Final] at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:655) ~[netty-transport-4.1.68.Final.jar:4.1.68.Final] at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:581) ~[netty-transport-4.1.68.Final.jar:4.1.68.Final] at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493) ~[netty-transport-4.1.68.Final.jar:4.1.68.Final] at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:986) ~[netty-common-4.1.68.Final.jar:4.1.68.Final] at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.68.Final.jar:4.1.68.Final] at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[netty-common-4.1.68.Final.jar:4.1.68.Final] at java.lang.Thread.run(Thread.java:748) ~[na:1.8.0_161]

org.chainmaker.sdk.ChainClientException: connect to peer error : io.grpc.StatusRuntimeException: UNAVAILABLE: io exception at org.chainmaker.sdk.ChainClient.sendTxRequest(ChainClient.java:1921) at org.chainmaker.sdk.ChainClient.sendRequest(ChainClient.java:2070) at org.chainmaker.sdk.ChainClient.proposalRequest(ChainClient.java:2047) at org.chainmaker.sdk.ChainClient.getChainConfig(ChainClient.java:812) at chainmaker.sdk.demo.ChainConfig.getChainConfig(ChainConfig.java:11) at chainmaker.sdk.demo.DemoApplication.main(DemoApplication.java:16) Exception in thread "main" java.lang.NullPointerException at chainmaker.sdk.demo.ChainConfig.getChainConfig(ChainConfig.java:15) at chainmaker.sdk.demo.DemoApplication.main(DemoApplication.java:16)