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File descriptor leak when using Anthropic client

Fresh3 days ago
Mar 14, 20260 views
Confidence Score49%
49%

Problem

I have tested anthropic 0.3.11 and 0.2.9 , both might have File descriptor leak . code 1 : [code block] code 2 : [code block] Both code led to File descriptor leak eventually after 5000-10000 loops . I ever tried to remove the retry and the same File descriptor leak happened . When changed to use [code block] everything is fine . no File descriptor leak at all .

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1 Fix

Canonical Fix
Unverified Fix
New Fix – Awaiting Verification

Fix File Descriptor Leak in Anthropic Client Usage

Medium Risk

The file descriptor leak occurs due to improper handling of connections in the Anthropic client library. Specifically, the library may not be closing HTTP connections properly after use, leading to exhaustion of available file descriptors after repeated calls in a loop. This can happen if the client is not configured to reuse connections or if the connections are not explicitly closed after their use.

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  1. 1

    Update Anthropic Client Configuration

    Ensure that the Anthropic client is configured to use connection pooling and reuse existing connections. This can help mitigate the file descriptor leak by reducing the number of new connections created.

    python
    client = AnthropicClient(connection_pool=True)
  2. 2

    Explicitly Close Connections

    After each request, explicitly close the connection to ensure that file descriptors are released. This can be done by calling the appropriate method provided by the client library.

    python
    response = client.request(...); client.close()
  3. 3

    Implement Retry Logic with Delay

    If the client encounters transient errors, implement a retry mechanism with a delay between retries to avoid rapid successive requests that can exacerbate the file descriptor leak.

    python
    import time
for attempt in range(max_attempts):
    try:
        response = client.request(...)
        break
    except Exception:
        time.sleep(retry_delay)
  4. 4

    Monitor File Descriptors

    Use system tools to monitor the number of open file descriptors before and after implementing the changes. This will help confirm that the leak has been resolved.

    bash
    lsof -u $(whoami) | wc -l
  5. 5

    Test Under Load

    Run a load test that simulates the original loop of 5000-10000 iterations to confirm that the file descriptor leak no longer occurs.

    python
    for i in range(10000):
    client.request(...)

Validation

Confirm that the number of open file descriptors stabilizes and does not exceed the system limit during the load test. Additionally, check logs for any connection errors or warnings.

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Environment

Submitted by

AC

Alex Chen

2450 rep

Tags

claudeanthropicllmapi