zkutil | zkSNARK circuits generated by Circom compiler

by poma Rust Version: Current License: MIT

X-Ray Key Features Code Snippets Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | zkutil Summary

zkutil is a Rust library. zkutil has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

A tool to work with zkSNARK circuits generated by circom compiler. Based on circom import code by @kobigurk.

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zkutil has a low active ecosystem.

It has 90 star(s) with 15 fork(s). There are 4 watchers for this library.

It had no major release in the last 6 months.

zkutil has no issues reported. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of zkutil is current.

Quality

zkutil has no bugs reported.

Security

zkutil has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

zkutil is licensed under the MIT License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

zkutil releases are not available. You will need to build from source code and install.

Installation instructions, examples and code snippets are available.

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Community Discussions

Trending Discussions on zkutil

HBase fully distributed mode [Zookeeper error while executing HBase shell]

Can't import ZKStringSerializer$

After upgrade Kafka to 2.5.0 ZkUtils is deprecated

Enable to view the Audit TRACE logs for HBASE Accessconroller

Kafka SASL zookeeper authentication

Spring Boot & Kafka, Producer thrown exception with key='null'

SIMPLE authentication is not enabled. Available:[TOKEN, KERBEROS] -Hbase Master failed to become active

Creating kafka topics with Java doesn't work

Hbase doesn't work well with spark-submit

kafka.common.KafkaException: Failed to parse the broker info from zookeeper

QUESTION

HBase fully distributed mode [Zookeeper error while executing HBase shell]

Asked 2021-Mar-17 at 00:35

Following these two tutorials: i.e tutorial 1 and tutorial 2, I was able to set up HBase cluster in fully-distributed mode. Initially the cluster seems to work okay.

The 'jps' output in HMaster/ Name node

The jps output in DataNodes/ RegionServers

Nevertheless, when every I try to execute hbase shell, it seems that the HBase processors are interrupted due to some Zookeeper error. The error is pasted below:

...

ANSWER

Answered 2021-Mar-17 at 00:35

After 5 days of hustle, I learned what went wrong. Posting my solution here. Hope it can help some of the other developers too. Also would like to thank @VV_FS for the comments.

In my scenario, I used virtual machines which I burrowed from an external party. Therefore, there were certain firewalls and other security measures. In case if you follow a similar experimental setup, these steps might help you.

To set up HBase cluster, follow the following tutorials.

Set up Hadoop in distributed mode.

Notes when setting up HBase in fully distributed-mode:

Make sure to open all the ports mentioned in the post. For example, use sudo ufw allow 9000 to open port 9000. Follow the command to open all the ports in relation to running Hadoop.

Set up Zookeeper in distributed mode.

Notes when setting up Zookeeper in fully distributed mode:

Make sure to open all the ports mentioned in the post. For example, use sudo ufw allow 3888 to open port 3888. Follow the command to open all the ports in relation to running Zookeeper.
DO NOT START ZOOKEEPER NODES AFTER INSTALLATION. ZOOKEEPER WILL BE MANAGED HBASE INTERNALLY. THEREFORE, DON'T START ZOOKEEPER AT THIS STAGE.

Set up HBase in distributed mode.

When setting up values for hbase-site.xml, use port number 60000 for hbase.master tag, not 60010. (thanks @VV_FS to point this out in the earlier discussion).
Make sure to open all the ports mentioned in the post. For example, use sudo ufw allow 60000 to open port 60000. Follow the command to open all the ports in relation to running Zookeeper.

[Important thoughts]: If encounters errors, always refer to HBase logs. In my case, hbase-mater-xxxxx.log and zookeeper-master--xxx.log helped me to track down exact errors.

Source https://stackoverflow.com/questions/66613998

QUESTION

Can't import ZKStringSerializer$

Asked 2021-Jan-04 at 17:51

I want to create kafka topic in Java. I have a sample code from stackoverflow. But the problem is that I couldn't import ZKStringSerializer$ and ZkUtils. I have all maven dependencies. What is the reason? Her is the code:

...

ANSWER

Answered 2021-Jan-04 at 17:51

I assume you copied from this post? If so, read the very top of that accepted answer.

Zookeeper is a deprecated method to create topics.

Use AdminClient.createTopics or a higher-level framework like dropwizard-kafka configuration or spring-kafka's @Bean to create topics

Also, use kafka-clients dependency, not the kafka_[scala.version] depdendency

Source https://stackoverflow.com/questions/65566929

QUESTION

After upgrade Kafka to 2.5.0 ZkUtils is deprecated

Asked 2020-Jul-22 at 09:42

One of Kafka new change in the upgrade from 2.3.0 to 2.5.0 is removing ZkUtils (see https://issues.apache.org/jira/browse/KAFKA-8545)

what is the best practice to remove the use and which package should I use instead

...

ANSWER

Answered 2020-Jul-22 at 09:42

You now need to use the Admin API createTopics() method to create topics:

Source https://stackoverflow.com/questions/63030314

QUESTION

Enable to view the Audit TRACE logs for HBASE Accessconroller

Asked 2020-Apr-27 at 10:05

I have enabled Accesscontrol coprocessor in Hbase for restricting the access, which is working fine. I tried to log the events of all the users like put,get,scan,drop etc in the audit log by setting up the below configurations in the log4j.properties, But not able to get the TRACE level logs for AccessControl even after setting the below property

...

ANSWER

Answered 2020-Apr-27 at 10:05

I have solved this issue, with the change in the log4j.propeties file as below

Source https://stackoverflow.com/questions/61453540

QUESTION

Kafka SASL zookeeper authentication

Asked 2020-Feb-04 at 22:00

I am facing the following error while enabling SASL on Zookeeper and broker authentication.

...

ANSWER

Answered 2018-Nov-12 at 11:00

I found the issue by increasing the log level to DEBUG. Basically follow the steps below. I don't use SSL but you will integrate it without any issue.

Following are my configuration files:

server.properties

Source https://stackoverflow.com/questions/43469962

QUESTION

Spring Boot & Kafka, Producer thrown exception with key='null'

Asked 2019-Aug-20 at 03:17

I'm trying to use Spring Boot with Kafka and ZooKeeper with Docker :

docker-compose.yml:

...

ANSWER

Answered 2018-Jan-12 at 17:25

Problem is not with sending key as null, Connection to a broker may not be established

try using local Kafka installation.
If you are using mac Docker for mac having some networking limitations https://docs.docker.com/docker-for-mac/networking/#known-limitations-use-cases-and-workarounds

Source https://stackoverflow.com/questions/48227857

QUESTION

SIMPLE authentication is not enabled. Available:[TOKEN, KERBEROS] -Hbase Master failed to become active

Asked 2019-Jul-19 at 08:06

I'm trying to set a HBase cluster with 3 nodes. I've been trying to configure Secure Hbase for a week now but I'm still getting the error :

...

ANSWER

Answered 2019-Jul-19 at 08:06

All right, I tried to copy hdfs-site.xml and core-site.xml to the hbase conf directory and it resolved the problem.

I'm not sure this is a "proper" way to configure Hbase tho, I'd rather have Hbase check the hdfs and core site directly in the hadoop conf dir. Any Idea how to do that ?

Source https://stackoverflow.com/questions/57097107

QUESTION

Creating kafka topics with Java doesn't work

Asked 2019-Jun-03 at 06:12

I'm trying to create Kafka topics using Java. But I get a Exception in thread "main" java.lang.NoSuchFieldError: DEFAULT_SSL_PRINCIPAL_MAPPING_RULES and I can't fix it.

My goal is to create a topic so that when I run my Kafka server to display my topics using this command bin/kafka-topics.sh --list --bootstrap-server localhost:9092, I can actually see my topic in the list.

(the command is from Kafka's official website https://kafka.apache.org/quickstart)

I looked up to this problem How to create a Topic in Kafka through Java which actually inspired my code, but not only it doesn't really help, but it seems like it uses deprecated classes and methods.

I tried to use what I believed to be more recent classes such as ZooKeeperClient, KafkaZkClient and AdminZkClient, but from what I understand, the method adminZkClient.createTopic(topic, noOfPartitions, noOfReplication, topicConfiguration, RackAwareMode.Disabled$.MODULE$); is what brings the exception. I don't know what it is about that function that creates the exception, whether I forgot something from my application.properties file or something else. Here's my code

...

ANSWER

Answered 2019-Jun-03 at 06:12

not sure why you get this exception. Here's a solution that works for me, and just uses the KafkaAdminClient:

Source https://stackoverflow.com/questions/56421511

QUESTION

Hbase doesn't work well with spark-submit

Asked 2019-May-22 at 16:38

I have an app that does some work and at the end it needs to read some file from hdfs and store it into hbase. The app runs when using master local with no issue using apache spark, but when I run it using spark-submit it doesn't work anymore,I get a fail.

The command line code is :

...

ANSWER

Answered 2019-May-22 at 15:04

java.lang.RuntimeException: Could not create  interface org.apache.hadoop.hbase.zookeeper.MetricsZooKeeperSource Is the hadoop compatibility jar on the classpath

Source https://stackoverflow.com/questions/56257214

QUESTION

kafka.common.KafkaException: Failed to parse the broker info from zookeeper

Asked 2018-Dec-05 at 12:29

I have deployed kafka in kubernetes using https://github.com/Yolean/kubernetes-kafka. But while consuming using kafka consumer, I get following error :

...

ANSWER

Answered 2018-Dec-05 at 12:29

Updating Kafka Version to 0.10.2.1 on consumer side solved the issue!

Source https://stackoverflow.com/questions/52498505

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