I am trying to create a DMS task to migrate data from RDS Postgres instance to S3 bucket. The full load works all fine, but the continuous replication is failing. Its giving this error:
"logical decoding requires wal_level >= logical"
When I checked the system settings from pg_settings, its showing that the setting "wal_level" has value "replica". So I tried to change the setting wal_level, but I am not able to find this setting in the Parameter Group in RDS. My RDS instance is using 9.6 version of parameters.
When I tried "ALTER SYSTEM SET wal_level TO 'logical'", it fails saying that "must be superuser to execute ALTER SYSTEM command", even though the user is under rds_superuser role.
Please suggest.
The Parameter name in Parameter Group is "rds.logical_replication" which needs to be changed to 1. The default value was 0.
This property changed "wal_level" value to "Logical".
Related
I installed apache-druid-0.22.1 as a cluster (master, data and query nodes) and enabled “druid-google-extensions” by adding it to the array druid.extensions.loadList in common.runtime.properties.
Finally I defined GOOGLE_APPLICATION_CREDENTIALS ( which has the value of service account json as defined in https://cloud.google.com/docs/authentication/production )as an environment variable of user that run the druid services.
However, I got the following error when I try to ingest data from GCR buckets:
Error: Cannot construct instance of
org.apache.druid.data.input.google.GoogleCloudStorageInputSource,
problem: Unable to provision, see the following errors: 1) Error in
custom provider, java.io.IOException: The Application Default
Credentials are not available. They are available if running on Google
App Engine, Google Compute Engine, or Google Cloud Shell. Otherwise,
the environment variable GOOGLE_APPLICATION_CREDENTIALS must be
defined pointing to a file defining the credentials. See
https://developers.google.com/accounts/docs/application-default-credentials
for more information. at
org.apache.druid.common.gcp.GcpModule.getHttpRequestInitializer(GcpModule.java:60)
(via modules: com.google.inject.util.Modules$OverrideModule ->
org.apache.druid.common.gcp.GcpModule) at
org.apache.druid.common.gcp.GcpModule.getHttpRequestInitializer(GcpModule.java:60)
(via modules: com.google.inject.util.Modules$OverrideModule ->
org.apache.druid.common.gcp.GcpModule) while locating
com.google.api.client.http.HttpRequestInitializer for the 3rd
parameter of
org.apache.druid.storage.google.GoogleStorageDruidModule.getGoogleStorage(GoogleStorageDruidModule.java:114)
at
org.apache.druid.storage.google.GoogleStorageDruidModule.getGoogleStorage(GoogleStorageDruidModule.java:114)
(via modules: com.google.inject.util.Modules$OverrideModule ->
org.apache.druid.storage.google.GoogleStorageDruidModule) while
locating org.apache.druid.storage.google.GoogleStorage 1 error at
[Source: (org.eclipse.jetty.server.HttpInputOverHTTP); line: 1,
column: 180] (through reference chain:
org.apache.druid.indexing.overlord.sampler.IndexTaskSamplerSpec["spec"]->org.apache.druid.indexing.common.task.IndexTask$IndexIngestionSpec["ioConfig"]->org.apache.druid.indexing.common.task.IndexTask$IndexIOConfig["inputSource"])
A case reported on this matter caught my attention. But I can not see
any verified solution to that case. Please help me.
We want to take data from GCP to on prem Druid. We don’t want to take cluster in GCP. So that we want solve this problem.
For future visitors:
If you run Druid by systemctl you then need to add required environments in service file of systemctl, to ensure it is always delivered to druid regardless of user or environment changes.
You must define the GOOGLE_APPLICATION_CREDENTIALS that points to a file path, and not contain the file content.
In a cluster (like Kubernetes), it's usual to mount a volume with the file in it, and to se the env var to point to that volume.
I am trying to create a datashare in Redshift by following this documentation. When I type this command:
CREATE DATASHARE datashare_name
I get this message:
ERROR: CREATE DATASHARE is not enabled.
I also tried to make it using console, but same issue.
So how to enable data sharing in Redshift ?
From the documents:here
Data sharing via datashare is only available for ra3 instance types
The document lists ra3.16xlarge, ra3.4xlarge, and ra3.xlplus instance types for producer and consumer clusters.
So, if I were in your place - I would first go back and check my instance type. If still not sure, drop a simple CS ticket and ask them if anything has changed recently & documentation is not updated
I'm trying to migrate and synchronize a PostgreSQL database using AWS DMS and I'm getting the following error.
Last Error Task error notification received from subtask 0, thread 0
[reptask/replicationtask.c:2673] [1020101] When working with Configured Slotname, user must
specify LSN; Error executing source loop; Stream component failed at subtask 0, component
st_0_D27UO7SI6SIKOSZ4V6RH4PPTZQ ; Stream component 'st_0_D27UO7SI6SIKOSZ4V6RH4PPTZQ'
terminated [reptask/replicationtask.c:2680] [1020101] Stop Reason FATAL_ERROR Error Level FATAL
I already created a replication slot and configured its name in the source endpoint.
DMS Engine version: 3.1.4
Does anyone knows anything that could help me?
Luan -
I experienced the same issue - I was trying to replicate data from Postgres to an S3 bucket.I would check two things - your version of Postgres and the DMS version being used.
I downgraded my RDS postgres version to 9.6 and my DMS version to 2.4.5 to get replication working.
You can find more details here -
https://docs.aws.amazon.com/dms/latest/userguide/CHAP_Source.PostgreSQL.html
I wanted to try the newer versions of DMS (3.1.4 and 3.3.0[beta]) as it has parquet support but I have gotten the same errors you mentioned above.
Hope this helps.
It appears AWS expects you to use the pglogical extension rather than test_decoding. You have to:
add pglogical to shared_preload_libraries in parameter options
reboot
CREATE EXTENSION pglogical;
On dms 3.4.2 and postgres 12.3 without the slotName= setting DMS created the slot for itself. Also make sure you exclude the pglogical schema from the migration task as it has unsupported data types.
P.S. When DMS hits resource limits it silently fails. After resolving the LSN errors, I continued to get failures of the type Last Error Task 'psql2es' was suspended due to 6 successive unexpected failures Stop Reason FATAL_ERROR Error Level FATAL without any errors in the logs. I resolved this issue using the Advanced task settings > Full load tuning settings and tuning the parameters downward.
While following this tutorial for deploying a simple Flask app to AWS RDS and ElasticBeanstalk, I am running into the error
sqlalchemy.exc.OperationalError: (OperationalError)
(2003, 'Can\'t connect to MySQL server on
\'flasktest.kedfifydb8esbdk.us-east-1.rds.amazonaws.com\'
((1049, u"Unknown database \'flaskdemo\'"))') None None
at python db_create.py.
In the statement
SQLALCHEMY_DATABASE_URI = ‘mysql+pymysql://<db_user>:<db_password>#<endpoint>/<db_url>’
what is <db_url>? Is it not precisely the name chosen for DB Instance at the RDS management console?
If, as I expect, that's the case, what else might I be missing?
Update soliciting comments
The entire process is ultimately frustrating. "Push this button", "click here", then do this and that, are all far too error prone and do not appeal to programmers. I'm now looking for a way to script all the deployment steps. And then the process becomes reproducible and reliable. That said, the experience of getting it right once from the GUI helps to identify a minimal working setup. A sequel exercise is to convert this tutorial to a script. Comments welcome.
I believe it would be the name of your DB within the instance, or specifically, the DB Name attribute. The name of the DB instance is the name of the RDS instance itself, and not the actual database that the RDS instance is hosting.
Let me know if you can find it...it should be under Created Time and above Username. If not, I can see if I can include a screen of one of my RDS instances.
I had the same error. Make sure you are correctly writing down the parameters in the URI string. Looks like the flash demo database does not exist!.
SQLALCHEMY_DATABASE_URI = 'mysql+pymysql://yourusername:dbpassword#endpointhere/dbname'
The 'DB Name' parameter listed under the Summary in the Database console IS NOT your dbname in the URI string!. The worst case creates another database and writes down your parameters. You should get the DB name in the 'Database options' while creating the database.
Also, make sure that your database is using a correct security group. The 'default' security group should be removed from the database and your new security group must allow access to your database.
Security - Security Groups
Security Group Here
I have a problem with connection to DynamoDB. I get this exception:
com.amazonaws.services.dynamodb.model.ResourceNotFoundException:
Requested resource not found (Service: AmazonDynamoDB; Status Code:
400; Error Code: ResourceNotFoundException; Request ID: ..
But I have a table and region is correct.
From the docs it's either you don't have a Table with that name or it is in CREATING status.
I would double check to verify that the table does in fact exist, in the correct region, and you're using an access key that can reach it
My problem was stupid but maybe someone has the same... I changed recently the default credentials of aws (~/.aws/credentials), I was testing in another account and forgot to rollback the values to the regular account.
I spent 1 day researching the problem in my project and now I should repay a debt to humanity and reduce the entropy of the universe a little.
Usually, this message says that your client can't reach a table in your DB.
You should check the next things:
1. Your database is running
2. Your accessKey and secretKey are valid for the database
3. Your DB endpoint is valid and contains correct protocol ("http://" or "https://"), and correct hostname, and correct port
4. Your table was created in the database.
5. Your table was created in the database in the same region that you set as a parameter in credentials. Optional, because some
database environments (e.g. Testcontainers Dynalite) don't have an incorrect value for the region. And any nonempty region value will be correct
In my case problem was that I couldn't save and load data from a table in tests with DynamoDB substituted by Testcontainers and Dynalite. I found out that in our project tables creates by Spring component marked with #Component annotation. And in tests, we are using a global setting for lazy loading components to test, so our component didn't load by default because no one call it in the test explicitly. ¯_(ツ)_/¯
If DynamoDB table is in a different region, make sure to set it before initialising the DynamoDB by
AWS.config.update({region: "your-dynamoDB-region" });
This works for me:)
Always ensure that you do one of the following:
The right default region is set up in the AWS CLI configuration files on all the servers, development machines that you are working on.
The best choice is to always specify these constants explicitly in a separate class/config in your project. Always import this in code and use it in the boto3 calls. This will provide flexibility if you were to add or change based on the enterprise requirements.
If your resources are like mine and all over the place, you can define the region_name when you're creating the resource.
I do this for all my instantiations as it forces me to think about what I'm putting/calling where.
boto3.resource("dynamodb", region_name='us-east-2')
I was getting this issue in my .NetCore Application.
Following fixed the issue for me in Startup class --> ConfigureServices method
services.AddDefaultAWSOptions(
new AWSOptions
{
Region = RegionEndpoint.GetBySystemName("eu-west-2")
});
I got Error warning Lambda : lifecycleIteration=0 lambda handler returned an error: ResourceNotFoundException: Requested resource not found
I spent 1 week to fix the issue.
And so its root cause and steps to find issue is mentioned in below Git Issue thread and fixed it.
https://github.com/soto-project/soto/issues/595