diff --git a/api/src/main.ts b/api/src/main.ts
index 60e879c..f7f65fa 100644
--- a/api/src/main.ts
+++ b/api/src/main.ts
@@ -1,13 +1,32 @@
 import 'dotenv/config';
+import process from 'node:process';
 import { NestFactory } from '@nestjs/core';
+import { LogLevel } from '@nestjs/common';
 import { NestExpressApplication } from '@nestjs/platform-express';
 import { AppModule } from './app/app.module.js';
 import getConfig from './config/config.js';
 
+function makeLogLevelList(): LogLevel[] {
+  // From: https://github.com/nestjs/nest/blob/master/packages/common/services/logger.service.ts#L9
+  const allLogLevels: LogLevel[] = ['verbose', 'debug', 'log', 'warn', 'error', 'fatal'];
+  // From: https://stackoverflow.com/a/78585135/1701505
+  const levels = allLogLevels.slice(
+    // TODO: possibly the env var shoud come via dotenv, or Config?
+    allLogLevels.indexOf((process.env.NESTJS_LOG_LEVEL || 'log') as LogLevel),
+    allLogLevels.length,
+  );
+  return levels;
+}
+
 async function bootstrap() {
   const config = getConfig();
 
-  const app = await NestFactory.create<NestExpressApplication>(AppModule);
+  const app = await NestFactory.create<NestExpressApplication>(
+    AppModule,
+    {
+      logger: makeLogLevelList()
+    }
+  );
 
   app.enableShutdownHooks();
 
diff --git a/api/src/ol/validators/validators.processor.ts b/api/src/ol/validators/validators.processor.ts
index 5fab7a8..94b06cf 100644
--- a/api/src/ol/validators/validators.processor.ts
+++ b/api/src/ol/validators/validators.processor.ts
@@ -110,6 +110,7 @@ export class ValidatorsProcessor extends WorkerHost {
     try {
       const validators = await this.validatorsService.queryValidators();
       await redisClient.set(VALIDATORS_CACHE_KEY, JSON.stringify(validators));
+      this.logger.debug(`Wrote this to the cache: ${JSON.stringify(validators).slice(0, 200)}`)
       const duration = Date.now() - start;
       this.logger.log(`Validators cache updated in ${duration}ms`);
     } catch (error) {
diff --git a/api/src/ol/validators/validators.service.ts b/api/src/ol/validators/validators.service.ts
index ee22a79..68fcab5 100644
--- a/api/src/ol/validators/validators.service.ts
+++ b/api/src/ol/validators/validators.service.ts
@@ -64,31 +64,45 @@ export class ValidatorsService {
     if (this.cacheEnabled) {
       const cachedValidators = await this.getFromCache<Validator[]>(VALIDATORS_CACHE_KEY);
       if (cachedValidators) {
+        this.logger.debug('Returning cached validators')
+        this.logger.debug(`Read this data from cache: ${JSON.stringify(cachedValidators).slice(0, 200)}`)
         return cachedValidators;
       }
     }
 
     const validators = await this.queryValidators();
-    await this.setCache('validators', validators);
+    await this.setCache(VALIDATORS_CACHE_KEY, validators);
+    this.logger.debug('Stored validators in cache')
+    this.logger.debug(`This data written back: ${JSON.stringify(validators).slice(0, 200)}`)
 
     return validators;
   }
 
   public async getValidatorsHandlers(): Promise<Map<string, string>> {
     if (this.cacheEnabled) {
+      this.logger.debug('Cache is enabled')
       const cacheHandlersString = await this.getFromCache<string>(VALIDATORS_HANDLERS_CACHE_KEY);
-      return cacheHandlersString
-        ? new Map<string, string>(Object.entries(cacheHandlersString))
-        : new Map();
+      // NOTE: cacheHandlersString is NOT a string (it is an Object)
+      let result:Map<string, string> = new Map([['bad', 'data']]);
+      if (cacheHandlersString) {
+        let entries = Object.entries(cacheHandlersString);
+        result = new Map<string, string>(entries)
+      } else {
+        result = new Map();
+      }
+      this.logger.debug(`returning handles map with ${result.size} entries`)
+      return result;
     }
 
     let handlers = new Map<string, string>();
     try {
       handlers = await this.loadValidatorHandles();
+      this.logger.debug(`Loaded validator handles: ${handlers}, ${JSON.stringify(handlers)}`)
     } catch (error) {
       this.logger.error('Error loading validators handlers', error);
     } finally {
       const obj = Object.fromEntries(handlers);
+      this.logger.debug(`Storing validator handles: ${obj}, ${JSON.stringify(obj)}`)
       await redisClient.set(VALIDATORS_HANDLERS_CACHE_KEY, JSON.stringify(obj));
       this.logger.log('Validators handlers cache updated');
     }
@@ -171,6 +185,7 @@ export class ValidatorsService {
     );
 
     let handles = await this.getValidatorsHandlers();
+    this.logger.debug(`handles map has ${handles.size} entries`)
     let allValidators = [...currentValidators, ...eligibleValidators];
     return await Promise.all(
       allValidators.map(async (validator) => {
@@ -180,6 +195,9 @@ export class ValidatorsService {
         const slowWallet = await this.olService.getSlowWallet(validator.address);
         const unlocked = Number(slowWallet?.unlocked);
         const addr = validator.address.toString('hex').toLocaleUpperCase();
+        if (!handles.get(addr)) {
+          this.logger.debug(`handles miss for address ${addr}`)
+        }
         const handle = handles.get(addr) || null;
 
         return new Validator({
@@ -319,6 +337,7 @@ export class ValidatorsService {
     const eligible = await this.olService.getEligibleValidators();
     const active = await this.olService.getValidatorSet();
     const handles = await this.getValidatorsHandlers();
+    this.logger.debug(`handles map has ${handles.size} entries`)
     const currentEpoch = await this.olService.aptosClient
       .getLedgerInfo()
       .then((info) => Number(info.epoch));
@@ -457,6 +476,7 @@ export class ValidatorsService {
 
   async loadValidatorHandles(): Promise<Map<string, string>> {
     if (!this.validatorHandlesUrl) {
+      this.logger.warn('Validator handles URL is not configured')
       return new Map<string, string>();
     }