Trouble Connecting To DynamoDB Locally with ECONNREFUSED - node.js

Question

I'm attempting to save form submissions to a DynamoDB table, however, I'm running into issues connecting locally. I'm running DynamoDB locally for now, but I would later like to move it back to a normal DDB instance accessible from Elastic Beanstalk.
I've downloaded and unzipped dynamodb-local into a directory and ran the java -Djava.library.path=./DynamoDBLocal_lib -jar DynamoDBLocal.jar -sharedDb
command, ensuring that I'm in the appropriate directory. When I run the command I get this:
Initializing DynamoDB Local with the following configuration:
Port: 8000
InMemory: false
DbPath: null
SharedDb: true
shouldDelayTransientStatuses: false
CorsParams: *
At this point I attempt to submit a form to my POST endpoint in app.js, but I get this repeating error in the terminal I'm running DynamoDB local in:
Jan 12, 2019 1:24:25 PM com.almworks.sqlite4java.Internal log
WARNING: [sqlite] cannot open DB[1]:
com.almworks.sqlite4java.SQLiteException: [-91] cannot load library: java.lang.UnsatisfiedLinkError: C:\cygwin64\home\Administrator\dynamodb_local_latest\DynamoDBLocal_lib\sqlite4java-win32-x64.dll: Access is denied
Jan 12, 2019 1:24:25 PM com.almworks.sqlite4java.Internal log
SEVERE: [sqlite] SQLiteQueue[shared-local-instance.db]: error running job queue
com.almworks.sqlite4java.SQLiteException: [-91] cannot load library: java.lang.UnsatisfiedLinkError: C:\cygwin64\home\Administrator\dynamodb_local_latest\DynamoDBLocal_lib\sqlite4java-win32-x64.dll: Access is denied
at com.almworks.sqlite4java.SQLite.loadLibrary(SQLite.java:97)
at com.almworks.sqlite4java.SQLiteConnection.open0(SQLiteConnection.java:1441)
at com.almworks.sqlite4java.SQLiteConnection.open(SQLiteConnection.java:282)
at com.almworks.sqlite4java.SQLiteConnection.open(SQLiteConnection.java:293)
at com.almworks.sqlite4java.SQLiteQueue.openConnection(SQLiteQueue.java:464)
at com.almworks.sqlite4java.SQLiteQueue.queueFunction(SQLiteQueue.java:641)
at com.almworks.sqlite4java.SQLiteQueue.runQueue(SQLiteQueue.java:623)
at com.almworks.sqlite4java.SQLiteQueue.access$000(SQLiteQueue.java:77)
at com.almworks.sqlite4java.SQLiteQueue$1.run(SQLiteQueue.java:205)
at java.base/java.lang.Thread.run(Unknown Source)
Caused by: java.lang.UnsatisfiedLinkError: C:\cygwin64\home\Administrator\dynamodb_local_latest\DynamoDBLocal_lib\sqlite4java-win32-x64.dll: Access is denied
at java.base/java.lang.ClassLoader$NativeLibrary.load0(Native Method)
at java.base/java.lang.ClassLoader$NativeLibrary.load(Unknown Source)
at java.base/java.lang.ClassLoader$NativeLibrary.loadLibrary(Unknown Source)
at java.base/java.lang.ClassLoader.loadLibrary0(Unknown Source)
at java.base/java.lang.ClassLoader.loadLibrary(Unknown Source)
at java.base/java.lang.Runtime.load0(Unknown Source)
at java.base/java.lang.System.load(Unknown Source)
at com.almworks.sqlite4java.Internal.tryLoadFromPath(Internal.java:340)
at com.almworks.sqlite4java.Internal.loadLibraryX(Internal.java:117)
at com.almworks.sqlite4java.SQLite.loadLibrary(SQLite.java:95)
... 9 more
In the terminal that I'm running the cluster of Node workers I'm getting the following error output from each worker (8) and then a DDB error:
Failed to create table in DB.
{ Error: connect ECONNREFUSED 127.0.0.1:8000
at Object.exports._errnoException (util.js:1022:11)
at exports._exceptionWithHostPort (util.js:1045:20)
at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1146:14)
message: 'connect ECONNREFUSED 127.0.0.1:8000',
code: 'NetworkingError',
errno: 'ECONNREFUSED',
syscall: 'connect',
address: '127.0.0.1',
port: 8000,
region: 'us-west-2',
hostname: 'localhost',
retryable: true,
time: 2019-01-12T20:31:00.742Z }
DDB Error: NetworkingError: connect ECONNREFUSED 127.0.0.1:8000
I promise I'm finishing this up. Here's my code for creating the DDB table (I pass const ddb = new AWS.DynamoDB() as the parameter from app.js):
const AWS = require('aws-sdk');
function createDDBTable(ddb, tableName) {
// console.log('ddb:\n',ddb);
const tableParams = {
AttributeDefinitions: [
{
AttributeName: 'email',
AttributeType: 'S'
},
{
AttributeName: 'id',
AttributeType: 'S'
}
],
KeySchema: [
{
AttributeName: 'email',
KeyType: 'HASH'
},
{
AttributeName: 'id',
KeyType: 'RANGE'
}
],
ProvisionedThroughput: {
ReadCapacityUnits: 8,
WriteCapacityUnits: 8
},
TableName: tableName,
StreamSpecification: {
StreamEnabled: false
}
};
ddb.createTable(tableParams, (err, data) => {
if(err) console.error('Failed to create table in DB.\n', err);
else console.log('Success creating table!', data);
})
}
module.exports = createDDBTable;
I'm at a loss for where I'm going wrong. All of my validation and endpoints work, however, when it comes time to create a table my code keeps me stumbling through errors. I also have a feeling I may need to adjust my options.config file a bit, but I'm not sure how to format that. Thanks in advance for any help! I tried to be thorough about my issue, but let me know if I can expand on anything else.

Answer 1

instead of http://localhost:port use your computer IP. it will work.
ex: http://xxx.yy.zz.aaa:port <--your computer IP