SAP Java system is down

Hi Experts,

One of our java stack sap system is down,

the error message which is found is in std_server1.out. Please suggest how to resolve this issue.

<af type="nursery" id="1898" timestamp="May 20 00:11:25 2012" intervalms="40352.962">

  <minimum requested_bytes="80" />

  <time exclusiveaccessms="0.145" />

  <nursery freebytes="0" totalbytes="369313792" percent="0" />

  <tenured freebytes="19544016" totalbytes="1728053248" percent="1" >

    <soa freebytes="19544016" totalbytes="1728053248" percent="1" />

    <loa freebytes="0" totalbytes="0" percent="0" />

  </tenured>

  <gc type="scavenger" id="1893" totalid="1948" intervalms="40356.377">

    <flipped objectcount="575059" bytes="40201832" />

    <tenured objectcount="53894" bytes="4385368" />

    <refs_cleared soft="16" weak="3883" phantom="0" />

    <finalization objectsqueued="1281" />

    <scavenger tiltratio="88" />

    <nursery freebytes="329643088" totalbytes="370225152" percent="89" tenureage="14" />

    <tenured freebytes="14788480" totalbytes="1728053248" percent="0" >

      <soa freebytes="14788480" totalbytes="1728053248" percent="0" />

      <loa freebytes="0" totalbytes="0" percent="0" />

    </tenured>

    <time totalms="56.839" />

  </gc>

  <nursery freebytes="329641040" totalbytes="370225152" percent="89" />

  <tenured freebytes="14788480" totalbytes="1728053248" percent="0" >

    <soa freebytes="14788480" totalbytes="1728053248" percent="0" />

    <loa freebytes="0" totalbytes="0" percent="0" />

  </tenured>

  <time totalms="60.563" />

</af>

Regards,

Shanthosh