How serious is this exception coming from kcl library?
I am using Java Amazon Kinesis Adaptor(1.5.4) on DynamoDB Streams. Below is the stack trace for the error I received:
ERROR c.a.s.k.c.l.w.ShardSyncTask - Caught exception while sync'ing Kinesis shards and leases
java.lang.IllegalStateException: Connection pool shut down
at org.apache.http.util.Asserts.check(Asserts.java:34)
at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.requestConnection(PoolingHttpClientConnectionManager.java:269)
at jdk.internal.reflect.GeneratedMethodAccessor48.invoke(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at com.amazonaws.http.conn.ClientConnectionManagerFactory$Handler.invoke(ClientConnectionManagerFactory.java:76)
at com.amazonaws.http.conn.$Proxy78.requestConnection(Unknown Source)
at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:176)
at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:186)
at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:185)
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:83)
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:56)
at com.amazonaws.http.apache.client.impl.SdkHttpClient.execute(SdkHttpClient.java:72)
at com.amazonaws.http.AmazonHttpClient$RequestExecutor.executeOneRequest(AmazonHttpClient.java:1346)
at com.amazonaws.http.AmazonHttpClient$RequestExecutor.executeHelper(AmazonHttpClient.java:1157)
at com.amazonaws.http.AmazonHttpClient$RequestExecutor.doExecute(AmazonHttpClient.java:814)
at com.amazonaws.http.AmazonHttpClient$RequestExecutor.executeWithTimer(AmazonHttpClient.java:781)
at com.amazonaws.http.AmazonHttpClient$RequestExecutor.execute(AmazonHttpClient.java:755)
at com.amazonaws.http.AmazonHttpClient$RequestExecutor.access$500(AmazonHttpClient.java:715)
at com.amazonaws.http.AmazonHttpClient$RequestExecutionBuilderImpl.execute(AmazonHttpClient.java:697)
at com.amazonaws.http.AmazonHttpClient.execute(AmazonHttpClient.java:561)
at com.amazonaws.http.AmazonHttpClient.execute(AmazonHttpClient.java:541)
at com.amazonaws.services.dynamodbv2.AmazonDynamoDBStreamsClient.doInvoke(AmazonDynamoDBStreamsClient.java:711)
at com.amazonaws.services.dynamodbv2.AmazonDynamoDBStreamsClient.invoke(AmazonDynamoDBStreamsClient.java:678)
at com.amazonaws.services.dynamodbv2.AmazonDynamoDBStreamsClient.invoke(AmazonDynamoDBStreamsClient.java:667)
at com.amazonaws.services.dynamodbv2.AmazonDynamoDBStreamsClient.executeDescribeStream(AmazonDynamoDBStreamsClient.java:364)
at com.amazonaws.services.dynamodbv2.AmazonDynamoDBStreamsClient.describeStream(AmazonDynamoDBStreamsClient.java:333)
at com.amazonaws.services.dynamodbv2.streamsadapter.AmazonDynamoDBStreamsAdapterClient.describeStream(AmazonDynamoDBStreamsAdapterClient.java:257)
at com.amazonaws.services.dynamodbv2.streamsadapter.DynamoDBStreamsProxy.getStreamInfo(DynamoDBStreamsProxy.java:166)
at com.amazonaws.services.dynamodbv2.streamsadapter.DynamoDBStreamsProxy.buildShardGraphSnapshot(DynamoDBStreamsProxy.java:279)
at com.amazonaws.services.dynamodbv2.streamsadapter.DynamoDBStreamsProxy.getShardList(DynamoDBStreamsProxy.java:221)
at com.amazonaws.services.dynamodbv2.streamsadapter.DynamoDBStreamsShardSyncer.getShardList(DynamoDBStreamsShardSyncer.java:320)
at com.amazonaws.services.dynamodbv2.streamsadapter.DynamoDBStreamsShardSyncer.syncShardLeases(DynamoDBStreamsShardSyncer.java:124)
at com.amazonaws.services.dynamodbv2.streamsadapter.DynamoDBStreamsShardSyncer.checkAndCreateLeasesForNewShards(DynamoDBStreamsShardSyncer.java:100)
at com.amazonaws.services.kinesis.clientlibrary.lib.worker.ShardSyncer.checkAndCreateLeasesForNewShards(ShardSyncer.java:41)
at com.amazonaws.services.kinesis.clientlibrary.lib.worker.ShardSyncTask.call(ShardSyncTask.java:84)
at com.amazonaws.services.kinesis.clientlibrary.lib.worker.MetricsCollectingTaskDecorator.call(MetricsCollectingTaskDecorator.java:49)
at com.amazonaws.services.kinesis.clientlibrary.lib.worker.ShardSyncTaskManager.lambda$checkAndSubmitNextTask$0(ShardSyncTaskManager.java:119)
at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1700)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:829)
I have new to KCL and still investigating. Hence posted this question here to get some insight.
