users@grizzly.java.net

Re: NPE's at low concurrency using AsyncHttpClient

From: Daniel Feist <dfeist_at_gmail.com>
Date: Fri, 13 Feb 2015 18:15:49 +0000

Hi,

1.8.x. We were originally using 1.8.14, but testing with 1.8.15 (which
has some changes to InputStreamBodyGenerator) made no difference.

Dan

On Fri, Feb 13, 2015 at 5:37 PM, Oleksiy Stashok
<oleksiy.stashok_at_oracle.com> wrote:
> Hi Dan,
>
> which AHC version are you using?
>
> WBR,
> Alexey.
>
>
> On 13.02.15 07:35, Daniel Feist wrote:
>>
>> Hi Alexey,
>>
>> We're geting a weird issue when using AHC/Grizzly for outbound HTTP
>> POST operations. When testing using POST and giving AHC an
>> InputStream to send, we get a significant number of NPE's occuring (1
>> to 5% of requests), even at just 10 client threads. I havn't been
>> able to reproduce this locally yet, but it happens consistently on our
>> test enviroment.
>>
>> I'm not sure how to get to the bottom of this (am in the middle of
>> trying) but given your much deeper knowledge of the codebase maybe you
>> have some insights/ideas. With a single client thread there are no
>> issues so it look like it may be some kind of race condition. Also
>> passing a String to AHC or turn off chunking such that
>> com.ning.http.client.generators.InputStreamBodyGenerator doesn't get
>> used, there are no NPE's either.
>>
>> Dan
>>
>> -----
>>
>> This is the error seen:
>>
>> WARN 2015-02-13 09:06:38,336
>> [[http_module_proxy].proxyConfig.worker.10]
>> org.glassfish.grizzly.filterchain.DefaultFilterChain: GRIZZLY0013:
>> Exception during FilterChain execution
>> java.lang.NullPointerException
>> at
>> com.ning.http.client.providers.grizzly.GrizzlyAsyncHttpProvider$AsyncHttpClientEventFilter.onHttpContentEncoded(GrizzlyAsyncHttpProvider.java:1243)
>> ~[?:?]
>> at
>> org.glassfish.grizzly.http.HttpCodecFilter.encodeHttpPacket(HttpCodecFilter.java:1463)
>> ~[?:?]
>> at
>> org.glassfish.grizzly.http.HttpClientFilter.encodeHttpPacket(HttpClientFilter.java:283)
>> ~[?:?]
>
>