} ## heap dumps # generate a heap dump when an allocation from the Java heap fails # heap dumps are created in the working directory of the JVM -XX:+HeapDumpOnOutOfMemor # specify an alternative path for heap dumps; ensure the directory exists and # has sufficient space -XX:HeapDumpPath=data # specify an alternative path for JVM fatal error logs -XX:ErrorFile=logs/hs_err_pid%p.log ## GC logging -Xlog:gc*,gc+age=trace,safepoint:file=logs/gc.log:utctime,pid,tags:filecount=32,filesize=64m elasticse...

} ## heap dumps # generate a heap dump when an allocation from the Java heap fails # heap dumps are created in the working directory of the JVM -XX:+HeapDumpOnOutOfMemor # specify an alternative path for heap dumps; ensure the directory exists and # has sufficient space -XX:HeapDumpPath=data # specify an alternative path for JVM fatal error logs -XX:ErrorFile=logs/hs_err_pid%p.log ## GC logging -Xlog:gc*,gc+age=trace,safepoint:file=logs/gc.log:utctime,pid,tags:filecount=32,filesize=64m elasticse...

{* ../../docs_src/events/tutorial003_py310.py hl[22] *}

## Alternative Events (<abbr title="veraltet, obsolet: Es soll nicht mehr verwendet werden">deprecatet</abbr>) { #alternative-events-deprecated }

/// warning | Achtung

![Swagger UI](https://fastapi.tiangolo.com/img/index/index-01-swagger-ui-simple.png)

### Alternative API-Dokumentation { #alternative-api-docs }

Und jetzt gehen Sie auf [http://127.0.0.1:8000/redoc](http://127.0.0.1:8000/redoc).

Sie sehen die alternative automatische Dokumentation (bereitgestellt von [ReDoc](https://github.com/Rebilly/ReDoc)):

} ## heap dumps # generate a heap dump when an allocation from the Java heap fails # heap dumps are created in the working directory of the JVM -XX:+HeapDumpOnOutOfMemor # specify an alternative path for heap dumps; ensure the directory exists and # has sufficient space -XX:HeapDumpPath=data # specify an alternative path for JVM fatal error logs -XX:ErrorFile=logs/hs_err_pid%p.log ## GC logging -Xlog:gc*,gc+age=trace,safepoint:file=logs/gc.log:utctime,pid,tags:filecount=32,filesize=64m elasticse...

          <name>deprecation</name>
          <description>A preferred alternative to this expression, in the case where it's deprecated.</description>
          <type>String</type>
        </field>
        <field>
          <version>1.0.0</version>
          <name>ban</name>
          <description>A preferred alternative to this expression, in the case where it's banned from use.</description>

///

## Standards-based benefits, alternative documentation { #standards-based-benefits-alternative-documentation }

And because the generated schema is from the [OpenAPI](https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.1.0.md) standard, there are many compatible tools.

        failover.handleFailure(failedChannel, error);

        // Verify pending operations were cleared from failed channel
        assertEquals(0, failedChannel.getRequestsPending());

        // Verify alternative channel was selected and operation added
        verify(mockLoadBalancer).selectChannel(mockOperation);
        verify(alternativeChannel).addPendingOperation(mockOperation);
    }

    @Test

        .build()
    server.useHttps(serverHandshakeCertificates.sslSocketFactory())
    url = server.url("/robots.txt")
  }

  /**
   * Test connecting to the main host then an alternative, although only subject alternative names
   * are used if present no special consideration of common name.
   */
  @Test
  fun commonThenAlternative() {
    server.enqueue(MockResponse())
    server.enqueue(MockResponse())

The `lifespan` parameter of the `FastAPI` app takes an **async context manager**, so we can pass our new `lifespan` async context manager to it.

{* ../../docs_src/events/tutorial003_py310.py hl[22] *}

## Alternative Events (deprecated) { #alternative-events-deprecated }

/// warning