I am trying to integrate the URLFrontier to a simple crawler but I am running into issues I have started URLFrontier which listens on port 9100 My client in Python is client.py import requests class URLFrontierClient: def __init__(self, base_url): self.base_url = base_url def get_next_url(self): response = requests.get(f"{self.base_url}/next_url") print(self.base_url/next_url) if response.status_code == 200: return response.json().get('url') return None if __name__ == "__main__": frontier = URLFrontierClient(base_url='http://localhost:9100') # Fetch the next URL next_url = frontier.get_next_url() if next_url: print(f"Next URL to crawl: {next_url}") # Add new URLs to the frontier new_urls = ["http://example.com/page1", "http://example.com/page2"] frontier.add_urls(new_urls) When I executed client.py I get the following error File "/Users/tvganesh/backup-mini/software/prorata/crawler1/crawler3/URLFrontierClient.py", line 29, in next_url = frontier.get_next_url() ^^^^^^^^^^^^^^^^^^^^^^^ File "/Users/tvganesh/backup-mini/software/prorata/crawler1/crawler3/URLFrontierClient.py", line 11, in get_next_url return response.json().get('url') When I tried curl http://localhost:9100/next_url I get this strange dumpHELP jvm_buffer_pool_used_bytes Used bytes of a given JVM buffer pool. TYPE jvm_buffer_pool_used_bytes gauge jvm_buffer_pool_used_bytes{pool="mapped",} 0.0 jvm_buffer_pool_used_bytes{pool="direct",} 658695.0 HELP jvm_buffer_pool_capacity_bytes Bytes capacity of a given JVM buffer pool. TYPE jvm_buffer_pool_capacity_bytes gauge jvm_buffer_pool_capacity_bytes{pool="mapped",} 0.0 jvm_buffer_pool_capacity_bytes{pool="direct",} 658694.0 HELP jvm_buffer_pool_used_buffers Used buffers of a given JVM buffer pool. TYPE jvm_buffer_pool_used_buffers gauge jvm_buffer_pool_used_buffers{pool="mapped",} 0.0 jvm_buffer_pool_used_buffers{pool="direct",} 17.0 HELP jvm_gc_collection_seconds Time spent in a given JVM garbage collector in seconds. TYPE jvm_gc_collection_seconds summary jvm_gc_collection_seconds_count{gc="G1 Young Generation",} 0.0 jvm_gc_collection_seconds_sum{gc="G1 Young Generation",} 0.0 jvm_gc_collection_seconds_count{gc="G1 Old Generation",} 0.0 .... Any help will be appreciated Continue reading...