GitHub user zwoop opened an issue:
https://github.com/apache/trafficserver/issues/1386
ATS hangs, possibly because of OpenSSL 1.1.0
Seeing very, very deep stack traces, like
```
...
#1602 0x0000000000792a94 in ssl_rm_cached_session (ctx=0x2b6b0bd23400,
sess=0x2b6b0f468600) at SSLUtils.cc:284
#1603 0x00002b6b08b4d1da in SSL_CTX_remove_session () from
/opt/openssl/lib/libssl.so.1.1
#1604 0x0000000000792a94 in ssl_rm_cached_session (ctx=0x2b6b0bd23400,
sess=0x2b6b0f468600) at SSLUtils.cc:284
#1605 0x00002b6b08b4d1da in SSL_CTX_remove_session () from
/opt/openssl/lib/libssl.so.1.1
#1606 0x0000000000792a94 in ssl_rm_cached_session (ctx=0x2b6b0bd23400,
sess=0x2b6b0f468600) at SSLUtils.cc:284
#1607 0x00002b6b08b4d1da in SSL_CTX_remove_session () from
/opt/openssl/lib/libssl.so.1.1
#1608 0x0000000000792a94 in ssl_rm_cached_session (ctx=0x2b6b0bd23400,
sess=0x2b6b0f468600) at SSLUtils.cc:284
#1609 0x00002b6b08b4d1da in SSL_CTX_remove_session () from
/opt/openssl/lib/libssl.so.1.1
#1610 0x0000000000792a94 in ssl_rm_cached_session (ctx=0x2b6b0bd23400,
sess=0x2b6b0f468600) at SSLUtils.cc:284
#1611 0x00002b6b08b4d1da in SSL_CTX_remove_session () from
/opt/openssl/lib/libssl.so.1.1
#1612 0x0000000000792a94 in ssl_rm_cached_session (ctx=0x2b6b0bd23400,
sess=0x2b6b0f468600) at SSLUtils.cc:284
...
```
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