Merge branch 'master' into ps_remove_graph

Author: petyaslavova

docs/advanced_features.rst

@@ -380,8 +380,6 @@ run_in_thread.
    >>> def exception_handler(ex, pubsub, thread):
    >>>     print(ex)
    >>>     thread.stop()
-   >>>     thread.join(timeout=1.0)
-   >>>     pubsub.close()
    >>> thread = p.run_in_thread(exception_handler=exception_handler)
 
 A PubSub object adheres to the same encoding semantics as the client

pyproject.toml

@@ -32,9 +32,17 @@ classifiers = [
 dependencies = ['async-timeout>=4.0.3; python_full_version<"3.11.3"']
 
 [project.optional-dependencies]
-hiredis = ["hiredis>=3.0.0"]
-ocsp = ["cryptography>=36.0.1", "pyopenssl==20.0.1", "requests>=2.31.0"]
-jwt = ["PyJWT~=2.9.0"]
+hiredis = [
+    "hiredis>=3.0.0",
+]
+ocsp = [
+    "cryptography>=36.0.1",
+    "pyopenssl>=20.0.1",
+    "requests>=2.31.0",
+]
+jwt = [
+    "PyJWT~=2.9.0",
+]
 
 [project.urls]
 Changes = "https://github.com/redis/redis-py/releases"

redis/asyncio/client.py

@@ -478,6 +478,7 @@ def lock(
         blocking_timeout: Optional[float] = None,
         lock_class: Optional[Type[Lock]] = None,
         thread_local: bool = True,
+        raise_on_release_error: bool = True,
     ) -> Lock:
         """
         Return a new Lock object using key ``name`` that mimics
@@ -524,6 +525,11 @@ def lock(
                      thread-1 would see the token value as "xyz" and would be
                      able to successfully release the thread-2's lock.
 
+        ``raise_on_release_error`` indicates whether to raise an exception when
+        the lock is no longer owned when exiting the context manager. By default,
+        this is True, meaning an exception will be raised. If False, the warning
+        will be logged and the exception will be suppressed.
+
         In some use cases it's necessary to disable thread local storage. For
         example, if you have code where one thread acquires a lock and passes
         that lock instance to a worker thread to release later. If thread
@@ -541,6 +547,7 @@ def lock(
             blocking=blocking,
             blocking_timeout=blocking_timeout,
             thread_local=thread_local,
+            raise_on_release_error=raise_on_release_error,
         )
 
     def pubsub(self, **kwargs) -> "PubSub":

redis/asyncio/cluster.py

@@ -839,6 +839,7 @@ def lock(
         blocking_timeout: Optional[float] = None,
         lock_class: Optional[Type[Lock]] = None,
         thread_local: bool = True,
+        raise_on_release_error: bool = True,
     ) -> Lock:
         """
         Return a new Lock object using key ``name`` that mimics
@@ -885,6 +886,11 @@ def lock(
                      thread-1 would see the token value as "xyz" and would be
                      able to successfully release the thread-2's lock.
 
+        ``raise_on_release_error`` indicates whether to raise an exception when
+        the lock is no longer owned when exiting the context manager. By default,
+        this is True, meaning an exception will be raised. If False, the warning
+        will be logged and the exception will be suppressed.
+
         In some use cases it's necessary to disable thread local storage. For
         example, if you have code where one thread acquires a lock and passes
         that lock instance to a worker thread to release later. If thread
@@ -902,6 +908,7 @@ def lock(
             blocking=blocking,
             blocking_timeout=blocking_timeout,
             thread_local=thread_local,
+            raise_on_release_error=raise_on_release_error,
         )
 
 
@@ -1597,18 +1604,24 @@ async def _execute(
                         result.args = (msg,) + result.args[1:]
                         raise result
 
-            default_node = nodes.get(client.get_default_node().name)
-            if default_node is not None:
-                # This pipeline execution used the default node, check if we need
-                # to replace it.
-                # Note: when the error is raised we'll reset the default node in the
-                # caller function.
-                for cmd in default_node[1]:
-                    # Check if it has a command that failed with a relevant
-                    # exception
-                    if type(cmd.result) in self.__class__.ERRORS_ALLOW_RETRY:
-                        client.replace_default_node()
-                        break
+            default_cluster_node = client.get_default_node()
+
+            # Check whether the default node was used. In some cases,
+            # 'client.get_default_node()' may return None. The check below
+            # prevents a potential AttributeError.
+            if default_cluster_node is not None:
+                default_node = nodes.get(default_cluster_node.name)
+                if default_node is not None:
+                    # This pipeline execution used the default node, check if we need
+                    # to replace it.
+                    # Note: when the error is raised we'll reset the default node in the
+                    # caller function.
+                    for cmd in default_node[1]:
+                        # Check if it has a command that failed with a relevant
+                        # exception
+                        if type(cmd.result) in self.__class__.ERRORS_ALLOW_RETRY:
+                            client.replace_default_node()
+                            break
 
         return [cmd.result for cmd in stack]
 

redis/asyncio/lock.py

@@ -1,4 +1,5 @@
 import asyncio
+import logging
 import threading
 import uuid
 from types import SimpleNamespace
@@ -10,6 +11,8 @@
 if TYPE_CHECKING:
     from redis.asyncio import Redis, RedisCluster
 
+logger = logging.getLogger(__name__)
+
 
 class Lock:
     """
@@ -85,6 +88,7 @@ def __init__(
         blocking: bool = True,
         blocking_timeout: Optional[Number] = None,
         thread_local: bool = True,
+        raise_on_release_error: bool = True,
     ):
         """
         Create a new Lock instance named ``name`` using the Redis client
@@ -128,6 +132,11 @@ def __init__(
                      thread-1 would see the token value as "xyz" and would be
                      able to successfully release the thread-2's lock.
 
+        ``raise_on_release_error`` indicates whether to raise an exception when
+        the lock is no longer owned when exiting the context manager. By default,
+        this is True, meaning an exception will be raised. If False, the warning
+        will be logged and the exception will be suppressed.
+
         In some use cases it's necessary to disable thread local storage. For
         example, if you have code where one thread acquires a lock and passes
         that lock instance to a worker thread to release later. If thread
@@ -144,6 +153,7 @@ def __init__(
         self.blocking_timeout = blocking_timeout
         self.thread_local = bool(thread_local)
         self.local = threading.local() if self.thread_local else SimpleNamespace()
+        self.raise_on_release_error = raise_on_release_error
         self.local.token = None
         self.register_scripts()
 
@@ -163,7 +173,14 @@ async def __aenter__(self):
         raise LockError("Unable to acquire lock within the time specified")
 
     async def __aexit__(self, exc_type, exc_value, traceback):
-        await self.release()
+        try:
+            await self.release()
+        except LockError:
+            if self.raise_on_release_error:
+                raise
+            logger.warning(
+                "Lock was unlocked or no longer owned when exiting context manager."
+            )
 
     async def acquire(
         self,

redis/client.py

@@ -473,6 +473,7 @@ def lock(
         blocking_timeout: Optional[float] = None,
         lock_class: Union[None, Any] = None,
         thread_local: bool = True,
+        raise_on_release_error: bool = True,
     ):
         """
         Return a new Lock object using key ``name`` that mimics
@@ -519,6 +520,11 @@ def lock(
                      thread-1 would see the token value as "xyz" and would be
                      able to successfully release the thread-2's lock.
 
+        ``raise_on_release_error`` indicates whether to raise an exception when
+        the lock is no longer owned when exiting the context manager. By default,
+        this is True, meaning an exception will be raised. If False, the warning
+        will be logged and the exception will be suppressed.
+
         In some use cases it's necessary to disable thread local storage. For
         example, if you have code where one thread acquires a lock and passes
         that lock instance to a worker thread to release later. If thread
@@ -536,6 +542,7 @@ def lock(
             blocking=blocking,
             blocking_timeout=blocking_timeout,
             thread_local=thread_local,
+            raise_on_release_error=raise_on_release_error,
         )
 
     def pubsub(self, **kwargs):
@@ -950,7 +957,7 @@ def check_health(self) -> None:
                 "did you forget to call subscribe() or psubscribe()?"
             )
 
-        if conn.health_check_interval and time.time() > conn.next_health_check:
+        if conn.health_check_interval and time.monotonic() > conn.next_health_check:
             conn.send_command("PING", self.HEALTH_CHECK_MESSAGE, check_health=False)
             self.health_check_response_counter += 1
 
@@ -1100,12 +1107,12 @@ def get_message(
         """
         if not self.subscribed:
             # Wait for subscription
-            start_time = time.time()
+            start_time = time.monotonic()
             if self.subscribed_event.wait(timeout) is True:
                 # The connection was subscribed during the timeout time frame.
                 # The timeout should be adjusted based on the time spent
                 # waiting for the subscription
-                time_spent = time.time() - start_time
+                time_spent = time.monotonic() - start_time
                 timeout = max(0.0, timeout - time_spent)
             else:
                 # The connection isn't subscribed to any channels or patterns,

redis/cluster.py

@@ -821,6 +821,7 @@ def lock(
         blocking_timeout=None,
         lock_class=None,
         thread_local=True,
+        raise_on_release_error: bool = True,
     ):
         """
         Return a new Lock object using key ``name`` that mimics
@@ -867,6 +868,11 @@ def lock(
                      thread-1 would see the token value as "xyz" and would be
                      able to successfully release the thread-2's lock.
 
+        ``raise_on_release_error`` indicates whether to raise an exception when
+        the lock is no longer owned when exiting the context manager. By default,
+        this is True, meaning an exception will be raised. If False, the warning
+        will be logged and the exception will be suppressed.
+
         In some use cases it's necessary to disable thread local storage. For
         example, if you have code where one thread acquires a lock and passes
         that lock instance to a worker thread to release later. If thread
@@ -884,6 +890,7 @@ def lock(
             blocking=blocking,
             blocking_timeout=blocking_timeout,
             thread_local=thread_local,
+            raise_on_release_error=raise_on_release_error,
         )
 
     def set_response_callback(self, command, callback):

redis/commands/search/commands.py

@@ -500,7 +500,7 @@ def search(
         For more information see `FT.SEARCH <https://redis.io/commands/ft.search>`_.
         """  # noqa
         args, query = self._mk_query_args(query, query_params=query_params)
-        st = time.time()
+        st = time.monotonic()
 
         options = {}
         if get_protocol_version(self.client) not in ["3", 3]:
@@ -512,7 +512,7 @@ def search(
             return res
 
         return self._parse_results(
-            SEARCH_CMD, res, query=query, duration=(time.time() - st) * 1000.0
+            SEARCH_CMD, res, query=query, duration=(time.monotonic() - st) * 1000.0
         )
 
     def explain(
@@ -602,7 +602,7 @@ def profile(
         Each parameter has a name and a value.
 
         """
-        st = time.time()
+        st = time.monotonic()
         cmd = [PROFILE_CMD, self.index_name, ""]
         if limited:
             cmd.append("LIMITED")
@@ -621,7 +621,7 @@ def profile(
         res = self.execute_command(*cmd)
 
         return self._parse_results(
-            PROFILE_CMD, res, query=query, duration=(time.time() - st) * 1000.0
+            PROFILE_CMD, res, query=query, duration=(time.monotonic() - st) * 1000.0
         )
 
     def spellcheck(self, query, distance=None, include=None, exclude=None):
@@ -940,7 +940,7 @@ async def search(
         For more information see `FT.SEARCH <https://redis.io/commands/ft.search>`_.
         """  # noqa
         args, query = self._mk_query_args(query, query_params=query_params)
-        st = time.time()
+        st = time.monotonic()
 
         options = {}
         if get_protocol_version(self.client) not in ["3", 3]:
@@ -952,7 +952,7 @@ async def search(
             return res
 
         return self._parse_results(
-            SEARCH_CMD, res, query=query, duration=(time.time() - st) * 1000.0
+            SEARCH_CMD, res, query=query, duration=(time.monotonic() - st) * 1000.0
         )
 
     async def aggregate(

redis/connection.py

@@ -4,11 +4,11 @@
 import ssl
 import sys
 import threading
+import time
 import weakref
 from abc import abstractmethod
 from itertools import chain
 from queue import Empty, Full, LifoQueue
-from time import time
 from typing import Any, Callable, Dict, List, Optional, Type, TypeVar, Union
 from urllib.parse import parse_qs, unquote, urlparse
 
@@ -542,7 +542,7 @@ def _ping_failed(self, error):
 
     def check_health(self):
         """Check the health of the connection with a PING/PONG"""
-        if self.health_check_interval and time() > self.next_health_check:
+        if self.health_check_interval and time.monotonic() > self.next_health_check:
             self.retry.call_with_retry(self._send_ping, self._ping_failed)
 
     def send_packed_command(self, command, check_health=True):
@@ -632,7 +632,7 @@ def read_response(
             raise
 
         if self.health_check_interval:
-            self.next_health_check = time() + self.health_check_interval
+            self.next_health_check = time.monotonic() + self.health_check_interval
 
         if isinstance(response, ResponseError):
             try:

redis/exceptions.py

@@ -89,7 +89,7 @@ def __init__(self, message=None, lock_name=None):
 
 
 class LockNotOwnedError(LockError):
-    "Error trying to extend or release a lock that is (no longer) owned"
+    "Error trying to extend or release a lock that is not owned (anymore)"
 
     pass