Remove Hazelcast entirely — use Spring simple cache instead

Hazelcast had lifecycle conflicts with Spring Boot 4 auto-configuration.
Removed completely:
- HazelcastConfig.java + HazelcastConfigTest.java
- Hazelcast dependency from pom.xml
- Hazelcast env vars from Helm deployment
- Hazelcast section from Helm values.yaml
- Hazelcast logger from logback-spring.xml
- All Hazelcast references from CLAUDE.md and README.md

Spring @Cacheable still works via simple in-memory ConcurrentHashMap.
Query caching (stats, kinds, node-detail, search, impact-trace) remains active.
For distributed caching in K8s, can add Redis or Caffeine later.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: aksOps

CLAUDE.md

@@ -2,7 +2,7 @@
 
 ## What This Project Is
 
-**OSSCodeIQ** -- a CLI tool + server that scans codebases to build a deterministic code knowledge graph. No AI, no external APIs -- pure static analysis. 97 detectors, 35+ languages, Neo4j Embedded graph database, Hazelcast distributed cache, Spring AI MCP server, REST API, web UI.
+**OSSCodeIQ** -- a CLI tool + server that scans codebases to build a deterministic code knowledge graph. No AI, no external APIs -- pure static analysis. 97 detectors, 35+ languages, Neo4j Embedded graph database, Spring AI MCP server, REST API, web UI.
 
 - **Maven coordinates:** `io.github.randomcodespace.iq:code-iq`
 - **CLI command:** `code-iq` (via `java -jar`)
@@ -16,7 +16,6 @@
 - Java 25 (virtual threads, pattern matching, records, sealed classes)
 - Spring Boot 4.0.5
 - Neo4j Embedded 2026.02.3 (Community Edition, no external server)
-- Hazelcast 5.6.0 (distributed cache, K8s auto-discovery)
 - Spring AI 1.1.4 (MCP server, streamable HTTP)
 - JavaParser 3.28.0 (Java AST analysis)
 - ANTLR 4.13.2 (TypeScript/JavaScript, Python, Go, C#, Rust, C++ grammars)
@@ -59,7 +58,7 @@ io.github.randomcodespace.iq
   |-- api/                         # REST controllers: GraphController, FlowController
   |-- cache/                       # AnalysisCache (H2), FileHasher
   |-- cli/                         # Picocli commands (14 commands + CodeIqCli parent + CliOutput helper)
-  |-- config/                      # Spring config: Neo4jConfig, HazelcastConfig, CodeIqConfig, JacksonConfig
+  |-- config/                      # Spring config: Neo4jConfig, CodeIqConfig, JacksonConfig
   |-- detector/                    # Detector interface + 97 concrete detectors
   |   |-- auth/                    # LDAP, certificate, session/header auth
   |   |-- config/                  # YAML, JSON, TOML, INI, properties, K8s, Helm, GHA, etc.
@@ -105,7 +104,6 @@ io.github.randomcodespace.iq
 ### Virtual Thread Safety
 - All file I/O and Neo4j operations run on virtual threads
 - The H2 analysis cache uses `synchronized` blocks for thread safety
-- Hazelcast cache operations are thread-safe by design
 - Detectors MUST be stateless -- Spring `@Component` beans are singletons
 
 ## CLI Commands
@@ -246,7 +244,6 @@ mvn checkstyle:check
 | `graph/GraphStore.java` | Neo4j facade |
 | `graph/GraphRepository.java` | Spring Data Neo4j repository |
 | `config/Neo4jConfig.java` | Embedded Neo4j configuration |
-| `config/HazelcastConfig.java` | Hazelcast cache configuration |
 | `config/CodeIqConfig.java` | Application configuration properties |
 | `config/ProjectConfigLoader.java` | Loads .osscodeiq.yml overrides |
 | `cache/AnalysisCache.java` | H2 incremental cache |

README.md

@@ -18,7 +18,7 @@
 
 ---
 
-**OSSCodeIQ** scans codebases to build a deterministic knowledge graph of code relationships -- classes, methods, endpoints, entities, dependencies, infrastructure resources, auth patterns, service topology, and more. 97 detectors across 35+ languages, Neo4j Embedded graph database, Hazelcast distributed cache, Spring AI MCP server (31 tools), REST API (32+ endpoints), React web UI, and zero AI dependency.
+**OSSCodeIQ** scans codebases to build a deterministic knowledge graph of code relationships -- classes, methods, endpoints, entities, dependencies, infrastructure resources, auth patterns, service topology, and more. 97 detectors across 35+ languages, Neo4j Embedded graph database, Spring AI MCP server (31 tools), REST API (32+ endpoints), React web UI, and zero AI dependency.
 
 ## Quick Start
 
@@ -49,7 +49,6 @@ java -jar target/code-iq-*-cli.jar serve /path/to/repo
 - **ANTLR grammars** for 10 languages (TypeScript, JavaScript, Python, Go, C#, Rust, Kotlin, Scala, C++)
 - **Neo4j Embedded** graph database -- full Cypher query support, no external server needed
 - **H2 analysis cache** -- batched streaming for memory-efficient indexing on CI runners
-- **Hazelcast distributed cache** -- K8s-ready, multi-pod query caching with near-cache
 - **Spring AI MCP server** -- 31 tools via streamable HTTP for AI-powered triage
 - **REST API** -- 32+ endpoints for programmatic access
 - **React UI** -- Dashboard, Topology (Cytoscape.js), Explorer, Flow, MCP Console (Monaco Editor), API Docs
@@ -348,15 +347,14 @@ The Docker image uses Eclipse Temurin 25, ZGC garbage collector, Spring AOT cach
 
 ## Kubernetes
 
-Helm chart included for K8s deployment with HPA auto-scaling and Hazelcast clustering:
+Helm chart included for K8s deployment with HPA auto-scaling:
 
 ```bash
 helm install code-iq helm/code-iq \
   --set image.tag=latest \
   --set persistence.graphPath=/data/graph.db
 ```
 
-- Hazelcast auto-discovery via K8s service DNS
 - HPA scales pods based on query load
 - Readiness/liveness health probes
 - Near-cache per pod for hot query data
@@ -399,7 +397,7 @@ java -jar target/code-iq-*-cli.jar serve .
 | Framework | Spring Boot 4.0.5 |
 | Graph DB | Neo4j Embedded 2026.02.3 (Community Edition) |
 | Analysis Cache | H2 (pure Java, virtual thread safe) |
-| Distributed Cache | Hazelcast 5.6.0 (K8s auto-discovery, near-cache) |
+| Cache | Spring Cache (simple in-memory, @Cacheable on query methods) |
 | MCP | Spring AI 1.1.4 (streamable HTTP) |
 | Java AST | JavaParser 3.28.0 |
 | Multi-lang AST | ANTLR 4.13.2 (10 grammars) |

helm/code-iq/templates/deployment.yaml

@@ -29,10 +29,6 @@ spec:
             - name: {{ $key }}
               value: {{ $value | quote }}
             {{- end }}
-            - name: HAZELCAST_CLUSTER_NAME
-              value: {{ .Values.hazelcast.clusterName | quote }}
-            - name: HAZELCAST_SERVICE_NAME
-              value: {{ .Values.hazelcast.serviceName | quote }}
           readinessProbe:
             httpGet:
               path: {{ .Values.probes.readiness.path }}

helm/code-iq/values.yaml

@@ -17,10 +17,6 @@ resources:
     cpu: 2000m
     memory: 4Gi
 
-hazelcast:
-  clusterName: code-iq
-  serviceName: code-iq-hazelcast
-
 autoscaling:
   enabled: true
   minReplicas: 2

pom.xml

@@ -23,7 +23,6 @@
     <properties>
         <java.version>25</java.version>
         <neo4j.version>2026.02.3</neo4j.version>
-        <hazelcast.version>5.6.0</hazelcast.version>
         <spring-ai.version>1.1.4</spring-ai.version>
         <picocli.version>4.7.7</picocli.version>
         <jacoco.version>0.8.14</jacoco.version>
@@ -87,13 +86,6 @@
             <artifactId>spring-ai-starter-mcp-server-webmvc</artifactId>
         </dependency>
 
-        <!-- Hazelcast Cache (Spring Boot 4 removed built-in Hazelcast autoconfig) -->
-        <dependency>
-            <groupId>com.hazelcast</groupId>
-            <artifactId>hazelcast</artifactId>
-            <version>${hazelcast.version}</version>
-        </dependency>
-
         <!-- Picocli CLI framework -->
         <dependency>
             <groupId>info.picocli</groupId>

src/main/java/io/github/randomcodespace/iq/config/HazelcastConfig.java

@@ -18,7 +18,6 @@
     <logger name="io.netty" level="ERROR" />
     <logger name="org.jctools" level="ERROR" />
     <logger name="io.micrometer" level="WARN" />
-    <logger name="com.hazelcast" level="WARN" />
     <logger name="org.apache.catalina" level="WARN" />
     <logger name="org.apache.coyote" level="WARN" />