Error TestClient - UNAVAILABLE: io exception

[grandpaWilly]

Issuing commands expected to give back data such as Getblock, while running java-tron in full node and has all blocks up to most-current downloaded, returns io exception error. What could be a causing this?

Running on Ubuntu 16.04.4, version 59 of java-tron testnet.

Here is a screenshot of the error from the terminal: https://i.imgur.com/0SwJKj5.png

[grandpaWilly]

To further document this, here is the full error the first time I run Getblock when starting wallet-cli:

Get current block !!!!
11:43:03.249 [main] INFO Configuration - user defined config file doesn't exists, use default config file in jar
11:43:03.470 [main] DEBUG io.netty.util.internal.logging.InternalLoggerFactory - Using SLF4J as the default logging framework
11:43:03.474 [main] DEBUG io.netty.channel.MultithreadEventLoopGroup - -Dio.netty.eventLoopThreads: 8
11:43:03.522 [main] DEBUG io.netty.util.internal.PlatformDependent0 - -Dio.netty.noUnsafe: false
11:43:03.523 [main] DEBUG io.netty.util.internal.PlatformDependent0 - Java version: 8
11:43:03.526 [main] DEBUG io.netty.util.internal.PlatformDependent0 - sun.misc.Unsafe.theUnsafe: available
11:43:03.528 [main] DEBUG io.netty.util.internal.PlatformDependent0 - sun.misc.Unsafe.copyMemory: available
11:43:03.528 [main] DEBUG io.netty.util.internal.PlatformDependent0 - java.nio.Buffer.address: available
11:43:03.529 [main] DEBUG io.netty.util.internal.PlatformDependent0 - direct buffer constructor: available
11:43:03.530 [main] DEBUG io.netty.util.internal.PlatformDependent0 - java.nio.Bits.unaligned: available, true
11:43:03.531 [main] DEBUG io.netty.util.internal.PlatformDependent0 - jdk.internal.misc.Unsafe.allocateUninitializedArray(int): unavailable prior to Java9
11:43:03.531 [main] DEBUG io.netty.util.internal.PlatformDependent0 - java.nio.DirectByteBuffer.(long, int): available
11:43:03.531 [main] DEBUG io.netty.util.internal.PlatformDependent - sun.misc.Unsafe: available
11:43:03.542 [main] DEBUG io.netty.util.internal.PlatformDependent - -Dio.netty.tmpdir: /tmp (java.io.tmpdir)
11:43:03.542 [main] DEBUG io.netty.util.internal.PlatformDependent - -Dio.netty.bitMode: 64 (sun.arch.data.model)
11:43:03.545 [main] DEBUG io.netty.util.internal.PlatformDependent - -Dio.netty.noPreferDirect: false
11:43:03.545 [main] DEBUG io.netty.util.internal.PlatformDependent - -Dio.netty.maxDirectMemory: 954728448 bytes
11:43:03.545 [main] DEBUG io.netty.util.internal.PlatformDependent - -Dio.netty.uninitializedArrayAllocationThreshold: -1
11:43:03.547 [main] DEBUG io.netty.util.internal.CleanerJava6 - java.nio.ByteBuffer.cleaner(): available
11:43:03.579 [main] DEBUG io.netty.channel.nio.NioEventLoop - -Dio.netty.noKeySetOptimization: false
11:43:03.579 [main] DEBUG io.netty.channel.nio.NioEventLoop - -Dio.netty.selectorAutoRebuildThreshold: 512
11:43:03.592 [main] DEBUG io.netty.util.internal.PlatformDependent - org.jctools-core.MpscChunkedArrayQueue: available
11:43:04.009 [grpc-default-executor-0] DEBUG io.netty.util.ResourceLeakDetector - -Dio.netty.leakDetection.level: simple
11:43:04.009 [grpc-default-executor-0] DEBUG io.netty.util.ResourceLeakDetector - -Dio.netty.leakDetection.targetRecords: 4
11:43:04.020 [grpc-default-executor-0] DEBUG io.netty.buffer.AbstractByteBuf - -Dio.netty.buffer.bytebuf.checkAccessible: true
11:43:04.022 [grpc-default-executor-0] DEBUG io.netty.util.ResourceLeakDetectorFactory - Loaded default ResourceLeakDetector: io.netty.util.ResourceLeakDetector@37946fc9
11:43:04.106 [grpc-default-executor-0] DEBUG io.netty.util.internal.InternalThreadLocalMap - -Dio.netty.threadLocalMap.stringBuilder.initialSize: 1024
11:43:04.106 [grpc-default-executor-0] DEBUG io.netty.util.internal.InternalThreadLocalMap - -Dio.netty.threadLocalMap.stringBuilder.maxSize: 4096
11:43:04.140 [grpc-default-executor-0] DEBUG io.netty.channel.DefaultChannelId - -Dio.netty.processId: 4922 (auto-detected)
11:43:04.145 [grpc-default-executor-0] DEBUG io.netty.util.NetUtil - -Djava.net.preferIPv4Stack: false
11:43:04.146 [grpc-default-executor-0] DEBUG io.netty.util.NetUtil - -Djava.net.preferIPv6Addresses: false
11:43:04.151 [grpc-default-executor-0] DEBUG io.netty.util.NetUtil - Loopback interface: venet0 (venet0, 127.0.0.2)
11:43:04.152 [grpc-default-executor-0] DEBUG io.netty.util.NetUtil - /proc/sys/net/core/somaxconn: 128
11:43:04.154 [grpc-default-executor-0] WARN io.netty.util.internal.MacAddressUtil - Failed to find a usable hardware address from the network interfaces; using random bytes: 41:69:d8:c6:8a:9b:b3:b3
11:43:04.155 [grpc-default-executor-0] DEBUG io.netty.channel.DefaultChannelId - -Dio.netty.machineId: 41:69:d8:c6:8a:9b:b3:b3 (auto-detected)
11:43:04.191 [grpc-default-executor-0] DEBUG io.netty.buffer.PooledByteBufAllocator - -Dio.netty.allocator.numHeapArenas: 8
11:43:04.192 [grpc-default-executor-0] DEBUG io.netty.buffer.PooledByteBufAllocator - -Dio.netty.allocator.numDirectArenas: 8
11:43:04.192 [grpc-default-executor-0] DEBUG io.netty.buffer.PooledByteBufAllocator - -Dio.netty.allocator.pageSize: 8192
11:43:04.192 [grpc-default-executor-0] DEBUG io.netty.buffer.PooledByteBufAllocator - -Dio.netty.allocator.maxOrder: 11
11:43:04.192 [grpc-default-executor-0] DEBUG io.netty.buffer.PooledByteBufAllocator - -Dio.netty.allocator.chunkSize: 16777216
11:43:04.192 [grpc-default-executor-0] DEBUG io.netty.buffer.PooledByteBufAllocator - -Dio.netty.allocator.tinyCacheSize: 512
11:43:04.193 [grpc-default-executor-0] DEBUG io.netty.buffer.PooledByteBufAllocator - -Dio.netty.allocator.smallCacheSize: 256
11:43:04.193 [grpc-default-executor-0] DEBUG io.netty.buffer.PooledByteBufAllocator - -Dio.netty.allocator.normalCacheSize: 64
11:43:04.193 [grpc-default-executor-0] DEBUG io.netty.buffer.PooledByteBufAllocator - -Dio.netty.allocator.maxCachedBufferCapacity: 32768
11:43:04.193 [grpc-default-executor-0] DEBUG io.netty.buffer.PooledByteBufAllocator - -Dio.netty.allocator.cacheTrimInterval: 8192
11:43:04.194 [grpc-default-executor-0] DEBUG io.netty.buffer.PooledByteBufAllocator - -Dio.netty.allocator.useCacheForAllThreads: true
11:43:04.215 [grpc-default-executor-0] DEBUG io.netty.buffer.ByteBufUtil - -Dio.netty.allocator.type: pooled
11:43:04.216 [grpc-default-executor-0] DEBUG io.netty.buffer.ByteBufUtil - -Dio.netty.threadLocalDirectBufferSize: 65536
11:43:04.217 [grpc-default-executor-0] DEBUG io.netty.buffer.ByteBufUtil - -Dio.netty.maxThreadLocalCharBufferSize: 16384
11:43:04.335 [grpc-default-executor-0] DEBUG io.netty.util.Recycler - -Dio.netty.recycler.maxCapacityPerThread: 32768
11:43:04.335 [grpc-default-executor-0] DEBUG io.netty.util.Recycler - -Dio.netty.recycler.maxSharedCapacityFactor: 2
11:43:04.336 [grpc-default-executor-0] DEBUG io.netty.util.Recycler - -Dio.netty.recycler.linkCapacity: 16
11:43:04.337 [grpc-default-executor-0] DEBUG io.netty.util.Recycler - -Dio.netty.recycler.ratio: 8
11:43:04.369 [main] ERROR TestClient - UNAVAILABLE: io exception
<===========--> 90% EXECUTING [2m 17s]

:run