hadoop vs pulsar
hadoop and pulsar share 16 technologies: JAX-RS, curator-recipes, hadoop-common, org.apache.hadoop:hadoop-hdfs-client, org.apache.avro:avro, com.github.ben-manes.caffeine:caffeine, jersey-container-servlet, com.google.inject:guice, org.eclipse.jetty:jetty-server, jersey-media-json-jackson, commons-logging, metrics-core, OpenTelemetry, org.apache.logging.log4j:log4j-api, org.slf4j:slf4j-api, and jcl-over-slf4j. Both are written in Java.
LinkedInWhat they share and what sets them apart
apache
hadoop
Apache Hadoop
Java15.7kRead on November 7, 2026, at commit 1fdf777What is hadoop built with?Only in hadoop
- curator-client
- hadoop-aws
- hadoop-azure
- hadoop-client
- hadoop-client-api
- hadoop-hdfs
- hadoop-mapreduce-client-common
- hadoop-mapreduce-client-core
- hbase-client
- hbase-common
- hbase-server
- kafka-clients
- mssql-jdbc
- software.amazon.awssdk:bundle
- org.apache.zookeeper:zookeeper
- org.apache.curator:curator-framework
- com.aliyun.oss:aliyun-sdk-oss
- com.qcloud:cos_api-bundle
- com.zaxxer:HikariCP
- javax.cache:cache-api
- org.apache.arrow:arrow-vector
- org.ehcache:ehcache
- org.hsqldb:hsqldb
- Jira
- Kafka
- jakarta.servlet-api
- jakarta.ws.rs-api
- jersey-common
- jersey-server
- JetBrains
- org.eclipse.jetty:jetty-servlet
- React
- React Router
- ember-resolver
- apacheds-core
- hadoop-auth
- kerb-simplekdc
- org.apache.kerby:kerb-core
- com.nimbusds:nimbus-jose-jwt
- jdom2
- xercesImpl
- org.apache.commons:commons-csv
- hadoop-yarn-common
- jul-to-slf4j
- log4j-1.2-api
- log4j-core
- log4j-slf4j-impl
- logback-classic
- reload4j
- slf4j-reload4j
- Tailwind CSS
class-variance-authority
tailwind-merge
- Radix UI
- React Hook Form
sonner
- xyflow
- @atlaskit/pragmatic-drag-and-drop
- cmdk
dagre
react-resizable-panels
vaul
- Lucide
- Zod
@hookform/resolvers
- ember-data
In common
- JAX-RS
- curator-recipes
- hadoop-common
- org.apache.hadoop:hadoop-hdfs-client
- org.apache.avro:avro
- com.github.ben-manes.caffeine:caffeine
- jersey-container-servlet
- com.google.inject:guice
- org.eclipse.jetty:jetty-server
- jersey-media-json-jackson
- commons-logging
- metrics-core
- OpenTelemetry
- org.apache.logging.log4j:log4j-api
- org.slf4j:slf4j-api
- jcl-over-slf4j
apache
pulsar
Apache Pulsar - distributed pub-sub messaging system
Java15.4kRead on November 8, 2026, at commit 1b6377eWhat is pulsar built with?Only in pulsar
- aws-java-sdk-bom
- zookeeper
- github.com/apache/pulsar-client-go
- RocksDB
- grpc-bom
- javax.ws.rs-api
- jersey-container-servlet-core
- jersey-hk2
- jetty-bom
- jetty-ee10-servlets
- vertx-web
- jakarta.servlet:jakarta.servlet-api
- org.glassfish.jersey.media:jersey-media-multipart
- org.eclipse.jetty:jetty-util
- org.eclipse.jetty.ee10.websocket:jetty-ee10-websocket-jetty-server
- org.eclipse.jetty.websocket:jetty-websocket-jetty-api
- org.eclipse.jetty.ee10:jetty-ee10-servlet
- javax.servlet:javax.servlet-api
- org.glassfish.jersey.core:jersey-server
- org.eclipse.jetty.ee8:jetty-ee8-servlet
- org.apache.felix:org.apache.felix.http.wrappers
- org.eclipse.jetty.compression:jetty-compression-gzip
- org.eclipse.jetty.compression:jetty-compression-server
- aws-java-sdk-sts
- java-jwt
- jjwt-impl
- jjwt-jackson
- jwks-rsa
- io.jsonwebtoken:jjwt-api
- org.apache.kerby:kerb-simplekdc
- commonmark-ext-gfm-tables
- commonmark-ext-heading-anchor
- org.commonmark:commonmark
- jakarta.validation-api
- client-java
- docker-java-core
- io.opentelemetry:opentelemetry-bom
- io.prometheus:simpleclient
- log4j-layout-template-json
- org.apache.logging.log4j:log4j-bom
- simpleclient_hotspot
- simpleclient_servlet
- slf4j-bom
- io.opentelemetry:opentelemetry-sdk
- org.apache.logging.log4j:log4j-core
- github.com/prometheus/client_model
- Prometheus
- github.com/sirupsen/logrus
- io.opentelemetry:opentelemetry-exporter-prometheus
- io.opentelemetry.semconv:opentelemetry-semconv
Side by side
hadooppulsar
SizeLines written by people and agents, without generated ones; code files, without tests.
hadoop3,097,660 lines written8,741 code files
pulsar1,232,950 lines written2,913 code files
Who writes itA commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
hadoop0.1% of its commits signed by AIWith Claude Code, Cursor, and GitHub Copilot
pulsar0.2% of its commits signed by AIWith Claude Code, GitHub Copilot, and Cursor
ActivityFrom GitHub and its history, on the day SeeRepo read it.
hadoopLast push November 7, 202627,988 commits15,710 stars
pulsarLast push November 8, 202615,517 commits15,359 stars
TestsThe files that test the code, and the share of code files a test imports.
hadoop4,764 test files62.5% of its code files have a test that imports them
pulsar2,292 test files63.3% of its code files have a test that imports them
Frequently asked questions
Which is bigger, hadoop or pulsar?
hadoop, with 3,097,660 lines written; pulsar has 1,232,950.
The proof: apache/hadoop's code at commit 1fdf777
Which has more GitHub stars, hadoop or pulsar?
hadoop, with 15,710 stars; pulsar has 15,359.
The proof: apache/hadoop on GitHub
Which has more tests, hadoop or pulsar?
hadoop, with 4,764 test files; pulsar has 2,292.
The proof: apache/hadoop's code at commit 1fdf777
Which was updated more recently, hadoop or pulsar?
pulsar: its last push was on November 8, 2026, and hadoop's on November 7, 2026.
The proof: apache/pulsar's commits on GitHub
Which has more commits signed by AI, hadoop or pulsar?
pulsar: an AI signed 0.2% of its commits, with Claude Code, GitHub Copilot, and Cursor; in hadoop, 0.1%.
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